diff --git a/minetest.conf b/minetest.conf
index e122db7b3..223587f4d 100644
--- a/minetest.conf
+++ b/minetest.conf
@@ -1,5 +1,8 @@
 # This is a game specific minetest.conf file, do not edit
 
+# If any of these settings are set in your minetest.conf file in ~/.minetest (Linux) or in the root directory of the game (Run in place/Windows)
+# They will override these settings
+
 # Basic game rules
 time_speed = 72
 
@@ -33,7 +36,7 @@ mgvalleys_spflags = noaltitude_chill,noaltitude_dry,nohumid_rivers,vary_river_de
 keepInventory = false
 
 # Performance settings
-# dedicated_server_step = 0.001
+dedicated_server_step = 0.05 #tick rate
 # abm_interval = 0.25
 # max_objects_per_block = 4096
 # max_packets_per_iteration = 10096
diff --git a/mods/CORE/controls/API.md b/mods/CORE/controls/API.md
new file mode 100644
index 000000000..8d9df6ca5
--- /dev/null
+++ b/mods/CORE/controls/API.md
@@ -0,0 +1,23 @@
+# controls
+
+## controls.players
+Table containing player controls at runtime.
+WARNING: Never use this table in writing
+
+## controls.register_on_press(func)
+Register a function that will be executed with (player, keyname) every time a player press a key.
+
+## controls.registered_on_press
+Table containing functions registered with controls.register_on_press().
+
+## controls.register_on_release(func)
+Register a function that will be executed with (player, keyname, clock_from_last_press) every time a player release a key.
+
+## controls.registered_on_release
+Table containing functions registered with controls.register_on_release().
+
+## controls.register_on_hold(func)
+Register a function that will be executed with (player, keyname, clock_from_start_hold) every time a player hold a key.
+
+## controls.registered_on_hold
+Table containing functions registered with controls.register_on_hold().
\ No newline at end of file
diff --git a/mods/CORE/flowlib/API.md b/mods/CORE/flowlib/API.md
new file mode 100644
index 000000000..20e85036b
--- /dev/null
+++ b/mods/CORE/flowlib/API.md
@@ -0,0 +1,45 @@
+# flowlib
+Simple flow functions.
+
+## flowlib.is_touching(realpos, nodepos, radius)
+Return true if a sphere of <radius> at <realpos> collide with node at <nodepos>.
+* realpos: position
+* nodepos: position
+* radius: number
+
+## flowlib.is_water(pos)
+Return true if node at <pos> is water, false overwise.
+* pos: position
+
+## flowlib.node_is_water(node)
+Return true if <node> is water, false overwise.
+* node: node
+
+## flowlib.is_lava(pos)
+Return true if node at <pos> is lava, false overwise.
+* pos: position
+
+## flowlib.node_is_lava(node)
+Return true if <node> is lava, false overwise.
+* node: node
+
+## flowlib.is_liquid(pos)
+Return true if node at <pos> is liquid, false overwise.
+* pos: position
+
+## flowlib.node_is_liquid(node)
+Return true if <node> is liquid, false overwise.
+* node: node
+
+## flowlib.quick_flow(pos, node)
+Return direction where the water is flowing (to be use to push mobs, items...).
+* pos: position
+* node: node
+
+## flowlib.move_centre(pos, realpos, node, radius)
+Return the pos of the nearest not water block near from <pos> in a sphere of <radius> at <realpos>.
+WARNING: This function is never used in mcl2, use at your own risk. The informations described here may be wrong.
+* pos: position
+* realpos: position, position of the entity
+* node: node
+* radius: number
\ No newline at end of file
diff --git a/mods/CORE/mcl_autogroup/API.md b/mods/CORE/mcl_autogroup/API.md
new file mode 100644
index 000000000..79b9770b5
--- /dev/null
+++ b/mods/CORE/mcl_autogroup/API.md
@@ -0,0 +1,27 @@
+# mcl_autogroup
+This mod emulate digging times from mc.
+
+## mcl_autogroup.can_harvest(nodename, toolname)
+Return true if <nodename> can be dig with <toolname>.
+* nodename: string, valid nodename
+* toolname: (optional) string, valid toolname
+
+## mcl_autogroup.get_groupcaps(toolname, efficiency)
+This function is used to calculate diggroups for tools.
+WARNING: This function can only be called after mod initialization.
+* toolname: string, name of the tool being enchanted (like "mcl_tools:diamond_pickaxe")
+* efficiency: (optional) integer, the efficiency level the tool is enchanted with (default 0)
+
+## mcl_autogroup.get_wear(toolname, diggroup)
+Return the max wear of <toolname> with <diggroup>
+WARNING: This function can only be called after mod initialization.
+* toolname: string, name of the tool used
+* diggroup: string, the name of the diggroup the tool is used on
+
+## mcl_autogroup.register_diggroup(group, def)
+* group: string, name of the group to register as a digging group
+* def: (optional) table, table with information about the diggroup (defaults to {} if unspecified)
+    * level: (optional) string, if specified it is an array containing the names of the different digging levels the digging group supports
+
+## mcl_autogroup.registered_diggroups
+List of registered diggroups, indexed by name.
\ No newline at end of file
diff --git a/mods/CORE/mcl_colors/API.md b/mods/CORE/mcl_colors/API.md
new file mode 100644
index 000000000..71cad335b
--- /dev/null
+++ b/mods/CORE/mcl_colors/API.md
@@ -0,0 +1,8 @@
+# mcl_colors
+Mod providing global table containing legacity minecraft colors to be used in mods.
+
+## mcl_colors.*
+Colors by upper name, in hex value.
+
+## mcl_colors.background.*
+Background colors by upper name, in hex value.
diff --git a/mods/CORE/mcl_explosions/API.md b/mods/CORE/mcl_explosions/API.md
new file mode 100644
index 000000000..cb0e9252d
--- /dev/null
+++ b/mods/CORE/mcl_explosions/API.md
@@ -0,0 +1,15 @@
+# mcl_explosions
+This mod provide helper functions to create explosions.
+
+## mcl_explosions.explode(pos, strength, info, puncher)
+* pos: position, initial position of the explosion
+* strenght: number, radius of the explosion
+* info: table, explosion informations:
+    * drop_chance: number, if specified becomes the drop chance of all nodes in the explosion (default: 1.0 / strength)
+    * max_blast_resistance: int, if specified the explosion will treat all non-indestructible nodes as having a blast resistance of no more than this value
+    * sound: bool, if true, the explosion will play a sound (default: true)
+    * particles: bool, if true, the explosion will create particles (default: true)
+    * fire: bool, if true, 1/3 nodes become fire (default: false)
+    * griefing: bool, if true, the explosion will destroy nodes (default: true)
+    * grief_protected: bool, if true, the explosion will also destroy nodes which have been protected (default: false)
+* puncher: (optional) entity, will be used as source for damage done by the explosion
\ No newline at end of file
diff --git a/mods/CORE/mcl_worlds/API.md b/mods/CORE/mcl_worlds/API.md
new file mode 100644
index 000000000..a5509431c
--- /dev/null
+++ b/mods/CORE/mcl_worlds/API.md
@@ -0,0 +1,80 @@
+# mcl_worlds
+This mod provides utility functions about positions and dimensions.
+
+## mcl_worlds.is_in_void(pos)
+This function returns:
+
+* true, true: if pos is in deep void (deadly)
+* true, false: if the pos is in void (non deadly)
+* false, false: owerwise
+
+Params:
+
+* pos: position
+
+## mcl_worlds.y_to_layer(y)
+This function is used to calculate the minetest y layer and dimension of the given <y> minecraft layer.
+Mainly used for ore generation.
+Takes an Y coordinate as input and returns:
+
+* The corresponding Minecraft layer (can be nil if void)
+* The corresponding Minecraft dimension ("overworld", "nether" or "end") or "void" if <y> is in the void
+If the Y coordinate is not located in any dimension, it will return: nil, "void"
+
+Params:
+
+* y: int
+
+## mcl_worlds.pos_to_dimension(pos)
+This function return the Minecraft dimension of <pos> ("overworld", "nether" or "end") or "void" if <y> is in the void.
+
+* pos: position
+
+## mcl_worlds.layer_to_y(layer, mc_dimension)
+Takes a Minecraft layer and a “dimension” name and returns the corresponding Y coordinate for MineClone 2.
+mc_dimension can be "overworld", "nether", "end" (default: "overworld").
+
+* layer: int
+* mc_dimension: string
+
+## mcl_worlds.has_weather(pos)
+Returns true if <pos> can have weather, false owerwise.
+Weather can be only in the overworld.
+
+* pos: position
+
+## mcl_worlds.has_dust(pos)
+Returns true if <pos> can have nether dust, false owerwise.
+Nether dust can be only in the nether.
+
+* pos: position
+
+## mcl_worlds.compass_works(pos)
+Returns true if compasses are working at <pos>, false owerwise.
+In mc, you cant use compass in the nether and the end.
+
+* pos: position
+
+## mcl_worlds.compass_works(pos)
+Returns true if clock are working at <pos>, false owerwise.
+In mc, you cant use clock in the nether and the end.
+
+* pos: position
+
+## mcl_worlds.register_on_dimension_change(function(player, dimension))
+Register a callback function func(player, dimension).
+It will be called whenever a player changes between dimensions.
+The void counts as dimension.
+
+* player: player, the player who changed the dimension
+* dimension: position, The new dimension of the player ("overworld", "nether", "end", "void").
+
+
+## mcl_worlds.registered_on_dimension_change
+Table containing all function registered with mcl_worlds.register_on_dimension_change()
+
+## mcl_worlds.dimension_change(player, dimension)
+Notify this mod of a dimmension change of <player> to <dimension>
+
+* player: player, player who changed the dimension
+* dimension: string, new dimension ("overworld", "nether", "end", "void")
\ No newline at end of file
diff --git a/mods/ENTITIES/mcl_boats/init.lua b/mods/ENTITIES/mcl_boats/init.lua
index efb6c073e..38e73565b 100644
--- a/mods/ENTITIES/mcl_boats/init.lua
+++ b/mods/ENTITIES/mcl_boats/init.lua
@@ -1,6 +1,6 @@
 local S = minetest.get_translator("mcl_boats")
 
-local boat_visual_size = {x = 3, y = 3, z = 3}
+local boat_visual_size = {x = 1, y = 1, z = 1}
 local paddling_speed = 22
 local boat_y_offset = 0.35
 local boat_y_offset_ground = boat_y_offset + 0.6
diff --git a/mods/ENTITIES/mcl_boats/models/mcl_boats_boat.b3d b/mods/ENTITIES/mcl_boats/models/mcl_boats_boat.b3d
index e53bc4129..6c9c31469 100644
Binary files a/mods/ENTITIES/mcl_boats/models/mcl_boats_boat.b3d and b/mods/ENTITIES/mcl_boats/models/mcl_boats_boat.b3d differ
diff --git a/mods/ENTITIES/mcl_item_entity/init.lua b/mods/ENTITIES/mcl_item_entity/init.lua
index 95b90e546..b65585a15 100644
--- a/mods/ENTITIES/mcl_item_entity/init.lua
+++ b/mods/ENTITIES/mcl_item_entity/init.lua
@@ -1,14 +1,36 @@
+--these are lua locals, used for higher performance
+local minetest,math,vector,ipairs = minetest,math,vector,ipairs
+
+--this is used for the player pool in the sound buffer
+local pool = {}
+
+local tick = false
+
+minetest.register_on_joinplayer(function(player)
+	local name
+	name = player:get_player_name()
+	pool[name] = 0
+end)
+
+minetest.register_on_leaveplayer(function(player)
+	local name
+	name = player:get_player_name()
+	pool[name] = nil
+end)
+
+
 local has_awards = minetest.get_modpath("awards")
 
-mcl_item_entity = {}
+local mcl_item_entity = {}
 
 --basic settings
 local item_drop_settings                 = {} --settings table
+item_drop_settings.dug_buffer            = 0.65 -- the warm up period before a dug item can be collected
 item_drop_settings.age                   = 1.0 --how old a dropped item (_insta_collect==false) has to be before collecting
 item_drop_settings.radius_magnet         = 2.0 --radius of item magnet. MUST BE LARGER THAN radius_collect!
 item_drop_settings.xp_radius_magnet      = 7.25 --radius of xp magnet. MUST BE LARGER THAN radius_collect!
 item_drop_settings.radius_collect        = 0.2 --radius of collection
-item_drop_settings.player_collect_height = 1.0 --added to their pos y value
+item_drop_settings.player_collect_height = 0.8 --added to their pos y value
 item_drop_settings.collection_safety     = false --do this to prevent items from flying away on laggy servers
 item_drop_settings.random_item_velocity  = true --this sets random item velocity if velocity is 0
 item_drop_settings.drop_single_item      = false --if true, the drop control drops 1 item instead of the entire stack, and sneak+drop drops the stack
@@ -74,103 +96,71 @@ local disable_physics = function(object, luaentity, ignore_check, reset_movement
 	end
 end
 
+
 minetest.register_globalstep(function(dtime)
+	
+	tick = not tick
+
 	for _,player in pairs(minetest.get_connected_players()) do
 		if player:get_hp() > 0 or not minetest.settings:get_bool("enable_damage") then
+
+
+			local name = player:get_player_name()
+			
 			local pos = player:get_pos()
+
+			if tick == true and pool[name] > 0 then
+				minetest.sound_play("item_drop_pickup", {
+					pos = pos,
+					gain = 0.7,
+					max_hear_distance = 16,
+					pitch = math.random(70,110)/100
+				})
+				if pool[name] > 6 then
+					pool[name] = 6
+				else
+					pool[name] = pool[name] - 1
+				end
+			end
+
+
+			
 			local inv = player:get_inventory()
 			local checkpos = {x=pos.x,y=pos.y + item_drop_settings.player_collect_height,z=pos.z}
 
 			--magnet and collection
 			for _,object in pairs(minetest.get_objects_inside_radius(checkpos, item_drop_settings.xp_radius_magnet)) do
 				if not object:is_player() and vector.distance(checkpos, object:get_pos()) < item_drop_settings.radius_magnet and object:get_luaentity() and object:get_luaentity().name == "__builtin:item" and object:get_luaentity()._magnet_timer and (object:get_luaentity()._insta_collect or (object:get_luaentity().age > item_drop_settings.age)) then
-					object:get_luaentity()._magnet_timer = object:get_luaentity()._magnet_timer + dtime
-					local collected = false
+
 					if object:get_luaentity()._magnet_timer >= 0 and object:get_luaentity()._magnet_timer < item_drop_settings.magnet_time and inv and inv:room_for_item("main", ItemStack(object:get_luaentity().itemstring)) then
 
 						-- Collection
-						if vector.distance(checkpos, object:get_pos()) <= item_drop_settings.radius_collect and not object:get_luaentity()._removed then
+						if not object:get_luaentity()._removed then
 							-- Ignore if itemstring is not set yet
 							if object:get_luaentity().itemstring ~= "" then
 								inv:add_item("main", ItemStack(object:get_luaentity().itemstring))
-								minetest.sound_play("item_drop_pickup", {
-									pos = pos,
-									max_hear_distance = 16,
-									gain = 1.0,
-								}, true)
-								check_pickup_achievements(object, player)
 
+								check_pickup_achievements(object, player)
 
 								-- Destroy entity
 								-- This just prevents this section to be run again because object:remove() doesn't remove the item immediately.
+								object:get_luaentity().target = checkpos
 								object:get_luaentity()._removed = true
-								object:remove()
-								collected = true
+
+								object:set_velocity({x=0,y=0,z=0})
+								object:set_acceleration({x=0,y=0,z=0})
+
+								object:move_to(checkpos)
+
+								pool[name] = pool[name] + 1
+
+								minetest.after(0.25, function()
+									--safety check
+									if object and object:get_luaentity() then
+										object:remove()
+									end
+								end)
 							end
-
-						-- Magnet
-						else
-
-							object:get_luaentity()._magnet_active = true
-							object:get_luaentity()._collector_timer = 0
-
-							-- Move object to player
-							disable_physics(object, object:get_luaentity())
-
-							local opos = object:get_pos()
-							local vec = vector.subtract(checkpos, opos)
-							vec = vector.add(opos, vector.divide(vec, 2))
-							object:move_to(vec)
-
-
-							--fix eternally falling items
-							minetest.after(0, function(object)
-								local lua = object:get_luaentity()
-								if lua then
-									object:set_acceleration({x=0, y=0, z=0})
-								end
-							end, object)
-
-
-							--this is a safety to prevent items flying away on laggy servers
-							if item_drop_settings.collection_safety == true then
-								if object:get_luaentity().init ~= true then
-									object:get_luaentity().init = true
-									minetest.after(1, function(args)
-										local playername = args[1]
-										local player = minetest.get_player_by_name(playername)
-										local object = args[2]
-										local lua = object:get_luaentity()
-										if player == nil or not player:is_player() or object == nil or lua == nil or lua.itemstring == nil then
-											return
-										end
-										if inv:room_for_item("main", ItemStack(object:get_luaentity().itemstring)) then
-											inv:add_item("main", ItemStack(object:get_luaentity().itemstring))
-											if not object:get_luaentity()._removed then
-												minetest.sound_play("item_drop_pickup", {
-													pos = pos,
-													max_hear_distance = 16,
-													gain = 1.0,
-												}, true)
-											end
-											check_pickup_achievements(object, player)
-											object:get_luaentity()._removed = true
-											object:remove()
-										else
-											enable_physics(object, object:get_luaentity())
-										end
-									end, {player:get_player_name(), object})
-								end
-							end
-						end
-					end
-
-					if not collected then
-						if object:get_luaentity()._magnet_timer > 1 then
-							object:get_luaentity()._magnet_timer = -item_drop_settings.magnet_time
-							object:get_luaentity()._magnet_active = false
-						elseif object:get_luaentity()._magnet_timer < 0 then
-							object:get_luaentity()._magnet_timer = object:get_luaentity()._magnet_timer + dtime
 						end
 					end
 
@@ -230,12 +220,13 @@ local function get_fortune_drops(fortune_drops, fortune_level)
 	return drop or {}
 end
 
+local doTileDrops = minetest.settings:get_bool("mcl_doTileDrops", true)
+
 function minetest.handle_node_drops(pos, drops, digger)
 	-- NOTE: This function override allows digger to be nil.
 	-- This means there is no digger. This is a special case which allows this function to be called
 	-- by hand. Creative Mode is intentionally ignored in this case.
 
-	local doTileDrops = minetest.settings:get_bool("mcl_doTileDrops", true)
 	if (digger and digger:is_player() and minetest.is_creative_enabled(digger:get_player_name())) or doTileDrops == false then
 		return
 	end
@@ -335,6 +326,10 @@ function minetest.handle_node_drops(pos, drops, digger)
 					z = -z
 				end
 				obj:set_velocity({x=1/x, y=obj:get_velocity().y, z=1/z})
+
+				obj:get_luaentity().age = item_drop_settings.dug_buffer
+
+				obj:get_luaentity()._insta_collect = false
 			end
 		end
 	end
@@ -401,6 +396,9 @@ minetest.register_entity(":__builtin:item", {
 	-- Number of seconds this item entity has existed so far
 	age = 0,
 
+	-- How old it has become in the collection animation
+	collection_age = 0,
+
 	set_item = function(self, itemstring)
 		self.itemstring = itemstring
 		if self.itemstring == "" then
@@ -566,6 +564,11 @@ minetest.register_entity(":__builtin:item", {
 
 	on_step = function(self, dtime)
 		if self._removed then
+			self.object:set_properties({
+				physical = false
+			})
+			self.object:set_velocity({x=0,y=0,z=0})
+			self.object:set_acceleration({x=0,y=0,z=0})
 			return
 		end
 		self.age = self.age + dtime
diff --git a/mods/ENTITIES/mcl_item_entity/sounds/Attributes.txt b/mods/ENTITIES/mcl_item_entity/sounds/Attributes.txt
new file mode 100644
index 000000000..781759352
--- /dev/null
+++ b/mods/ENTITIES/mcl_item_entity/sounds/Attributes.txt
@@ -0,0 +1 @@
+ Item_Drop_Pickup - https://freesound.org/people/benniknop/sounds/317848/ (License: CC0)
diff --git a/mods/ENTITIES/mcl_item_entity/sounds/item_drop_pickup.1.ogg b/mods/ENTITIES/mcl_item_entity/sounds/item_drop_pickup.1.ogg
deleted file mode 100644
index 8010ff0a2..000000000
Binary files a/mods/ENTITIES/mcl_item_entity/sounds/item_drop_pickup.1.ogg and /dev/null differ
diff --git a/mods/ENTITIES/mcl_item_entity/sounds/item_drop_pickup.2.ogg b/mods/ENTITIES/mcl_item_entity/sounds/item_drop_pickup.2.ogg
deleted file mode 100644
index a5087ab7d..000000000
Binary files a/mods/ENTITIES/mcl_item_entity/sounds/item_drop_pickup.2.ogg and /dev/null differ
diff --git a/mods/ENTITIES/mcl_item_entity/sounds/item_drop_pickup.3.ogg b/mods/ENTITIES/mcl_item_entity/sounds/item_drop_pickup.3.ogg
deleted file mode 100644
index f234a482c..000000000
Binary files a/mods/ENTITIES/mcl_item_entity/sounds/item_drop_pickup.3.ogg and /dev/null differ
diff --git a/mods/ENTITIES/mcl_item_entity/sounds/item_drop_pickup.4.ogg b/mods/ENTITIES/mcl_item_entity/sounds/item_drop_pickup.4.ogg
deleted file mode 100644
index 6436f2678..000000000
Binary files a/mods/ENTITIES/mcl_item_entity/sounds/item_drop_pickup.4.ogg and /dev/null differ
diff --git a/mods/ENTITIES/mcl_item_entity/sounds/item_drop_pickup.ogg b/mods/ENTITIES/mcl_item_entity/sounds/item_drop_pickup.ogg
new file mode 100644
index 000000000..e7f5df094
Binary files /dev/null and b/mods/ENTITIES/mcl_item_entity/sounds/item_drop_pickup.ogg differ
diff --git a/mods/ENTITIES/mcl_mobs/api.lua b/mods/ENTITIES/mcl_mobs/api.lua
index f1df87e8b..0a038ba13 100644
--- a/mods/ENTITIES/mcl_mobs/api.lua
+++ b/mods/ENTITIES/mcl_mobs/api.lua
@@ -735,7 +735,9 @@ local item_drop = function(self, cooked, looting_level)
 			end
 
 			-- add item if it exists
-			obj = minetest.add_item(pos, ItemStack(item .. " " .. num))
+			for x = 1, num do
+				obj = minetest.add_item(pos, ItemStack(item .. " " .. 1))
+			end
 
 			if obj and obj:get_luaentity() then
 
@@ -2817,6 +2819,10 @@ local do_states = function(self, dtime)
 					local arrow, ent
 					local v = 1
 					if not self.shoot_arrow then
+						self.firing = true
+						minetest.after(1, function()
+							self.firing = false
+						end)
 						arrow = minetest.add_entity(p, self.arrow)
 						ent = arrow:get_luaentity()
 						if ent.velocity then
@@ -4221,6 +4227,11 @@ function mobs:register_arrow(name, def)
 		switch = 0,
 		owner_id = def.owner_id,
 		rotate = def.rotate,
+		on_punch = function(self)
+			local vel = self.object:get_velocity()
+			self.object:set_velocity({x=vel.x * -1, y=vel.y * -1, z=vel.z * -1})
+		end,
+		collisionbox = def.collisionbox or {0, 0, 0, 0, 0, 0},
 		automatic_face_movement_dir = def.rotate
 			and (def.rotate - (pi / 180)) or false,
 
@@ -4283,7 +4294,7 @@ function mobs:register_arrow(name, def)
 
 			if self.hit_player or self.hit_mob or self.hit_object then
 
-				for _,player in pairs(minetest.get_objects_inside_radius(pos, 1.0)) do
+				for _,player in pairs(minetest.get_objects_inside_radius(pos, 1.5)) do
 
 					if self.hit_player
 					and player:is_player() then
diff --git a/mods/ENTITIES/mobs_mc/enderman.lua b/mods/ENTITIES/mobs_mc/enderman.lua
index efc789344..22599dd9e 100644
--- a/mods/ENTITIES/mobs_mc/enderman.lua
+++ b/mods/ENTITIES/mobs_mc/enderman.lua
@@ -534,9 +534,11 @@ mobs:register_mob("mobs_mc:enderman", {
 			--if (minetest.get_timeofday() * 24000) > 5001 and (minetest.get_timeofday() * 24000) < 19000 then
 			--	self:teleport(nil)
 			--else
+			if pr:next(1, 8) == 8 then --FIXME: real mc rate
 				self:teleport(hitter)
-				self.attack=hitter
-				self.state="attack"
+			end
+			self.attack=hitter
+			self.state="attack"
 			--end
 		end
 	end,
diff --git a/mods/ENTITIES/mobs_mc/ghast.lua b/mods/ENTITIES/mobs_mc/ghast.lua
index 679a28c13..7aed9395e 100644
--- a/mods/ENTITIES/mobs_mc/ghast.lua
+++ b/mods/ENTITIES/mobs_mc/ghast.lua
@@ -63,6 +63,15 @@ mobs:register_mob("mobs_mc:ghast", {
 	makes_footstep_sound = false,
 	instant_death = true,
 	fire_resistant = true,
+	do_custom = function(self)
+		if self.firing == true then
+			self.base_texture = {"mobs_mc_ghast_firing.png"}
+			self.object:set_properties({textures=self.base_texture})
+		else
+			self.base_texture = {"mobs_mc_ghast.png"}
+			self.object:set_properties({textures=self.base_texture})
+		end
+	end,
 })
 
 
@@ -74,6 +83,7 @@ mobs:register_arrow("mobs_mc:fireball", {
 	visual_size = {x = 1, y = 1},
 	textures = {"mcl_fire_fire_charge.png"},
 	velocity = 15,
+	collisionbox = {-.5, -.5, -.5, .5, .5, .5},
 
 	hit_player = function(self, player)
 		if rawget(_G, "armor") and armor.last_damage_types then
diff --git a/mods/ENTITIES/mobs_mc/textures/mobs_mc_ghast_firing.png b/mods/ENTITIES/mobs_mc/textures/mobs_mc_ghast_firing.png
new file mode 100644
index 000000000..3e5b41c32
Binary files /dev/null and b/mods/ENTITIES/mobs_mc/textures/mobs_mc_ghast_firing.png differ
diff --git a/mods/HUD/hudbars/default_settings.lua b/mods/HUD/hudbars/default_settings.lua
index 0bd267d0e..ce43cc8be 100644
--- a/mods/HUD/hudbars/default_settings.lua
+++ b/mods/HUD/hudbars/default_settings.lua
@@ -20,9 +20,9 @@ if hb.settings.bar_type == "progress_bar" then
 	hb.settings.start_offset_right.x = hb.load_setting("hudbars_start_offset_right_x", "number", 15)
 	hb.settings.start_offset_right.y = hb.load_setting("hudbars_start_offset_right_y", "number", -86)
 else
-	hb.settings.start_offset_left.x = hb.load_setting("hudbars_start_statbar_offset_left_x", "number", -265)
+	hb.settings.start_offset_left.x = hb.load_setting("hudbars_start_statbar_offset_left_x", "number", -258)
 	hb.settings.start_offset_left.y = hb.load_setting("hudbars_start_statbar_offset_left_y", "number", -90)
-	hb.settings.start_offset_right.x = hb.load_setting("hudbars_start_statbar_offset_right_x", "number", 25)
+	hb.settings.start_offset_right.x = hb.load_setting("hudbars_start_statbar_offset_right_x", "number", 16)
 	hb.settings.start_offset_right.y = hb.load_setting("hudbars_start_statbar_offset_right_y", "number", -90)
 end
 -- Modified in MCL2!
diff --git a/mods/ITEMS/REDSTONE/mesecons_mvps/init.lua b/mods/ITEMS/REDSTONE/mesecons_mvps/init.lua
index 669edbcbb..8cd5ae872 100644
--- a/mods/ITEMS/REDSTONE/mesecons_mvps/init.lua
+++ b/mods/ITEMS/REDSTONE/mesecons_mvps/init.lua
@@ -74,6 +74,7 @@ function mesecon.is_mvps_unsticky(node, pulldir, stack, stackid)
 end
 
 -- Functions to be called on mvps movement
+-- See also the callback
 function mesecon.register_on_mvps_move(callback)
 	mesecon.on_mvps_move[#mesecon.on_mvps_move+1] = callback
 end
@@ -405,17 +406,20 @@ mesecon.register_mvps_unsticky("mcl_colorblocks:glazed_terracotta_brown")
 mesecon.register_mvps_unsticky("mcl_colorblocks:glazed_terracotta_light_blue")
 mesecon.register_mvps_unsticky("mcl_colorblocks:glazed_terracotta_pink")
 
+-- Includes node heat when moving them
 mesecon.register_on_mvps_move(mesecon.move_hot_nodes)
 
--- Check for falling after moving node
 mesecon.register_on_mvps_move(function(moved_nodes)
 	for i = 1, #moved_nodes do
 		local moved_node = moved_nodes[i]
+		-- Check for falling after moving node
 		mesecon.on_placenode(moved_node.pos, moved_node.node)
 		minetest.after(0, function()
 			minetest.check_for_falling(moved_node.oldpos)
 			minetest.check_for_falling(moved_node.pos)
 		end)
+
+		-- Callback for on_mvps_move stored in nodedef
 		local node_def = minetest.registered_nodes[moved_node.node.name]
 		if node_def and node_def.mesecon and node_def.mesecon.on_mvps_move then
 			node_def.mesecon.on_mvps_move(moved_node.pos, moved_node.node,
diff --git a/mods/ITEMS/mcl_armor/armor.lua b/mods/ITEMS/mcl_armor/armor.lua
index a879f7240..05a020016 100644
--- a/mods/ITEMS/mcl_armor/armor.lua
+++ b/mods/ITEMS/mcl_armor/armor.lua
@@ -367,6 +367,7 @@ mcl_player.player_register_model("mcl_armor_character.b3d", {
 		run_walk	= {x=440, y=459},
 		run_walk_mine	= {x=461, y=480},
 		sit_mount	= {x=484, y=484},
+		die	= {x=498, y=498},
 	},
 })
 
diff --git a/mods/ITEMS/mcl_armor/models/mcl_armor_character.b3d b/mods/ITEMS/mcl_armor/models/mcl_armor_character.b3d
index c6a1274c5..a658f753c 100644
Binary files a/mods/ITEMS/mcl_armor/models/mcl_armor_character.b3d and b/mods/ITEMS/mcl_armor/models/mcl_armor_character.b3d differ
diff --git a/mods/ITEMS/mcl_armor/models/mcl_armor_character.blend b/mods/ITEMS/mcl_armor/models/mcl_armor_character.blend
index 88db35cf5..12869b59d 100644
Binary files a/mods/ITEMS/mcl_armor/models/mcl_armor_character.blend and b/mods/ITEMS/mcl_armor/models/mcl_armor_character.blend differ
diff --git a/mods/ITEMS/mcl_armor/models/mcl_armor_character_female.b3d b/mods/ITEMS/mcl_armor/models/mcl_armor_character_female.b3d
index cd2fca988..44494d1ec 100644
Binary files a/mods/ITEMS/mcl_armor/models/mcl_armor_character_female.b3d and b/mods/ITEMS/mcl_armor/models/mcl_armor_character_female.b3d differ
diff --git a/mods/ITEMS/mcl_armor/models/mcl_armor_character_female.blend b/mods/ITEMS/mcl_armor/models/mcl_armor_character_female.blend
index 098417b42..c854a49e5 100644
Binary files a/mods/ITEMS/mcl_armor/models/mcl_armor_character_female.blend and b/mods/ITEMS/mcl_armor/models/mcl_armor_character_female.blend differ
diff --git a/mods/ITEMS/mcl_bows/models/mcl_bows_arrow.obj b/mods/ITEMS/mcl_bows/models/mcl_bows_arrow.obj
index 8530efa78..bee2c0f4b 100644
--- a/mods/ITEMS/mcl_bows/models/mcl_bows_arrow.obj
+++ b/mods/ITEMS/mcl_bows/models/mcl_bows_arrow.obj
@@ -1,56 +1,56 @@
-# Blender v2.91.0 OBJ File: ''
+# Blender v2.92.0 OBJ File: ''
 # www.blender.org
 mtllib mcl_bows_arrow.mtl
 o Plane
-v -3.782006 -1.443249 0.000500
-v -3.782006 1.444249 0.000500
-v 3.782006 1.444249 0.000500
-v 3.782006 -1.443249 0.000500
-v 3.331104 1.069925 1.085017
-v 3.331104 -1.100076 1.085017
-v 3.331104 1.069925 -1.064830
-v 3.331104 -1.100076 -1.064829
-v 3.782006 0.001000 1.443749
-v 3.782006 0.001000 -1.443750
-v -3.782006 0.001000 -1.443749
-v -3.782006 0.001000 1.443750
-v 3.782006 0.000000 -1.443750
-v 3.782006 0.000000 1.443749
-v -3.782006 0.000000 1.443750
-v -3.782006 0.000000 -1.443749
 v 3.782006 1.444249 -0.000500
 v 3.782006 -1.443249 -0.000500
 v -3.782006 -1.443249 -0.000500
 v -3.782006 1.444249 -0.000500
-vt 0.000000 0.300000
-vt 0.000000 0.700000
-vt 1.000000 0.700000
-vt 1.000000 0.300000
-vt -0.007553 -0.000373
-vt 0.296712 -0.000373
-vt 0.296712 0.298611
-vt -0.007553 0.298611
-vt 0.000000 0.300000
-vt 1.000000 0.300000
-vt 1.000000 0.700000
-vt 0.000000 0.700000
-vt 0.000000 0.300000
-vt 1.000000 0.300000
-vt 1.000000 0.700000
-vt 0.000000 0.700000
-vt 0.000000 0.300000
-vt 0.000000 0.700000
-vt 1.000000 0.700000
-vt 1.000000 0.300000
-vn -0.0000 -0.0000 -1.0000
-vn 1.0000 -0.0000 0.0000
+v 3.331104 -1.100076 -1.064829
+v 3.331104 1.069925 -1.064830
+v 3.331104 1.069925 1.085017
+v 3.331104 -1.100076 1.085017
+v 3.782006 0.001000 -1.443750
+v -3.782006 0.001000 -1.443749
+v -3.782006 0.001000 1.443750
+v 3.782006 0.001000 1.443749
+v 3.782006 1.444249 0.000500
+v -3.782006 1.444249 0.000500
+v -3.782006 -1.443249 0.000500
+v 3.782006 -1.443249 0.000500
+v 3.782006 0.000000 -1.443750
+v 3.782006 -0.000000 1.443749
+v -3.782006 -0.000000 1.443750
+v -3.782006 0.000000 -1.443749
+vt -0.000893 0.835148
+vt -0.000893 1.008567
+vt 0.486244 1.008567
+vt 0.486244 0.835148
+vt 0.159016 0.682983
+vt 0.159016 0.849928
+vt -0.005031 0.849928
+vt -0.005031 0.682983
+vt -0.000893 0.835148
+vt 0.486244 0.835148
+vt 0.486244 1.008567
+vt -0.000893 1.008567
+vt -0.000893 0.835148
+vt 0.486244 0.835148
+vt 0.486244 1.008567
+vt -0.000893 1.008567
+vt -0.000893 0.835148
+vt -0.000893 1.008567
+vt 0.486244 1.008567
+vt 0.486244 0.835148
+vn 0.0000 0.0000 -1.0000
+vn 1.0000 0.0000 0.0000
 vn 0.0000 1.0000 0.0000
-vn 0.0000 0.0000 1.0000
-vn 0.0000 -1.0000 0.0000
+vn 0.0000 -0.0000 1.0000
+vn -0.0000 -1.0000 -0.0000
 usemtl Material.002
-s off
-f 17/1/1 18/2/1 19/3/1 20/4/1
-f 8/5/2 7/6/2 5/7/2 6/8/2
-f 10/9/3 11/10/3 12/11/3 9/12/3
-f 3/13/4 2/14/4 1/15/4 4/16/4
-f 13/17/5 14/18/5 15/19/5 16/20/5
+s 1
+f 1/1/1 2/2/1 3/3/1 4/4/1
+f 5/5/2 6/6/2 7/7/2 8/8/2
+f 9/9/3 10/10/3 11/11/3 12/12/3
+f 13/13/4 14/14/4 15/15/4 16/16/4
+f 17/17/5 18/18/5 19/19/5 20/20/5
diff --git a/mods/ITEMS/mcl_bows/textures/mcl_bows_arrow.png b/mods/ITEMS/mcl_bows/textures/mcl_bows_arrow.png
index 244405288..f7bd92a9c 100644
Binary files a/mods/ITEMS/mcl_bows/textures/mcl_bows_arrow.png and b/mods/ITEMS/mcl_bows/textures/mcl_bows_arrow.png differ
diff --git a/mods/ITEMS/mcl_core/nodes_liquid.lua b/mods/ITEMS/mcl_core/nodes_liquid.lua
index 0479c7f72..4696a629a 100644
--- a/mods/ITEMS/mcl_core/nodes_liquid.lua
+++ b/mods/ITEMS/mcl_core/nodes_liquid.lua
@@ -7,10 +7,10 @@ local WATER_ALPHA = 179
 local WATER_VISC = 1
 local LAVA_VISC = 7
 local LIGHT_LAVA = minetest.LIGHT_MAX
-local USE_TEXTURE_ALPHA
+local USE_TEXTURE_ALPHA = true
+
 if minetest.features.use_texture_alpha_string_modes then
 	USE_TEXTURE_ALPHA = "blend"
-	WATER_ALPHA = nil
 end
 
 local lava_death_messages = {
@@ -40,7 +40,6 @@ minetest.register_node("mcl_core:water_flowing", {
 	},
 	sounds = mcl_sounds.node_sound_water_defaults(),
 	is_ground_content = false,
-	alpha = WATER_ALPHA,
 	use_texture_alpha = USE_TEXTURE_ALPHA,
 	paramtype = "light",
 	paramtype2 = "flowingliquid",
@@ -86,7 +85,6 @@ S("• When water is directly below lava, the water turns into stone."),
 	},
 	sounds = mcl_sounds.node_sound_water_defaults(),
 	is_ground_content = false,
-	alpha = WATER_ALPHA,
 	use_texture_alpha = USE_TEXTURE_ALPHA,
 	paramtype = "light",
 	walkable = false,
diff --git a/mods/ITEMS/mcl_end/end_crystal.lua b/mods/ITEMS/mcl_end/end_crystal.lua
index b6b9fdd6a..d089c3cdf 100644
--- a/mods/ITEMS/mcl_end/end_crystal.lua
+++ b/mods/ITEMS/mcl_end/end_crystal.lua
@@ -70,7 +70,7 @@ minetest.register_entity("mcl_end:crystal", {
 		collisionbox = {-1, 0.5, -1, 1, 2.5, 1},
 		mesh = "mcl_end_crystal.b3d",
 		textures = {"mcl_end_crystal.png"},
-		collide_with_objects = true,
+		collide_with_objects = false,
 	},
 	on_punch = crystal_explode,
 	on_activate = set_crystal_animation,
diff --git a/mods/ITEMS/mcl_fishing/init.lua b/mods/ITEMS/mcl_fishing/init.lua
index 228d490ea..2bd0ed515 100644
--- a/mods/ITEMS/mcl_fishing/init.lua
+++ b/mods/ITEMS/mcl_fishing/init.lua
@@ -303,8 +303,8 @@ local flying_bobber_ENTITY={
 	collisionbox = {0,0,0,0,0,0},
 	pointable = false,
 
-	get_staticdata = get_staticdata,
-	on_activate = on_activate,
+	get_staticdata = mcl_throwing.get_staticdata,
+	on_activate = mcl_throwing.on_activate,
 
 	_lastpos={},
 	_thrower = nil,
diff --git a/mods/ITEMS/mcl_ocean/init.lua b/mods/ITEMS/mcl_ocean/init.lua
index 2a103b8d0..f723a1f3f 100644
--- a/mods/ITEMS/mcl_ocean/init.lua
+++ b/mods/ITEMS/mcl_ocean/init.lua
@@ -1,3 +1,5 @@
+mcl_ocean = {}
+
 -- Prismarine (includes sea lantern)
 dofile(minetest.get_modpath(minetest.get_current_modname()).."/prismarine.lua")
 
diff --git a/mods/ITEMS/mcl_ocean/kelp.lua b/mods/ITEMS/mcl_ocean/kelp.lua
index 3c6e32422..3aefe85f8 100644
--- a/mods/ITEMS/mcl_ocean/kelp.lua
+++ b/mods/ITEMS/mcl_ocean/kelp.lua
@@ -1,71 +1,494 @@
+-- TODO: whenever it becomes possible to fully implement kelp without the
+-- plantlike_rooted limitation, please update accordingly.
+--
+-- TODO: In MC, you can't actually destroy kelp by bucket'ing water in the middle.
+-- However, because of the plantlike_rooted hack, we'll just allow it for now.
+
 local S = minetest.get_translator("mcl_ocean")
 local mod_doc = minetest.get_modpath("doc") ~= nil
 
--- List of supported surfaces for seagrass and kelp
-local surfaces = {
-	{ "dirt", "mcl_core:dirt" },
-	{ "sand", "mcl_core:sand", 1 },
-	{ "redsand", "mcl_core:redsand", 1 },
-	{ "gravel", "mcl_core:gravel", 1 },
-}
+--------------------------------------------------------------------------------
+-- local-ify runtime functions
+--------------------------------------------------------------------------------
+-- objects
+local mt_registered_items = minetest.registered_items
+local mt_registered_nodes = minetest.registered_nodes
 
-local function get_kelp_top(pos, node)
-	local size = math.ceil(node.param2 / 16)
-	local pos_water = table.copy(pos)
-	pos_water.y = pos_water.y + size
-	return pos_water, minetest.get_node(pos_water)
+-- functions
+local mt_log = minetest.log
+local mt_add_item = minetest.add_item
+local mt_get_item_group = minetest.get_item_group
+local mt_get_node = minetest.get_node
+local mt_get_node_level = minetest.get_node_level
+local mt_get_node_max_level = minetest.get_node_max_level
+local mt_get_node_or_nil = minetest.get_node_or_nil
+local mt_get_node_timer = minetest.get_node_timer
+local mt_get_meta = minetest.get_meta
+local mt_hash_node_position = minetest.hash_node_position
+local mt_set_node = minetest.set_node
+local mt_swap_node = minetest.swap_node
+local mt_pos_to_string = minetest.pos_to_string
+local mt_is_protected = minetest.is_protected
+local mt_record_protection_violation = minetest.record_protection_violation
+
+local mt_is_creative_enabled = minetest.is_creative_enabled
+local mt_sound_play = minetest.sound_play
+
+local math_min = math.min
+local math_max = math.max
+local math_ceil = math.ceil
+local math_floor = math.floor
+local math_random = math.random
+local string_format = string.format
+local table_copy = table.copy
+local table_insert = table.insert
+
+-- DEBUG: functions
+-- local log = minetest.log
+-- local chatlog = minetest.chat_send_all
+
+--------------------------------------------------------------------------------
+-- Kelp API
+--------------------------------------------------------------------------------
+
+local kelp = {}
+mcl_ocean.kelp = kelp
+
+-- Kelp minimum and maximum age. Once reached the maximum, kelp no longer grows.
+kelp.MIN_AGE = 0
+kelp.MAX_AGE = 25
+
+-- Tick interval (in seconds) for updating kelp.
+kelp.TICK = 0.2
+
+-- Tick interval (in seconds) to store kelp meta.
+kelp.META_TICK = 2
+
+-- Max age queue length
+kelp.MAX_AGE_QUEUE = 20
+
+-- The average amount of growth for kelp in a day is 2.16 (https://youtu.be/5Bp4lAjAk3I)
+-- Normally, a day lasts 20 minutes, meaning kelp.next_grow() is executed
+-- 1200 / TICK times. Per tick probability = (216/100) / (1200/TICK)
+-- NOTE: currently, we can't exactly use the same type of randomness MC does, because
+-- it has multiple complicated sets of PRNGs.
+-- NOTE: Small loss of precision, should be 10 to preserve it.
+-- kelp.ROLL_GROWTH_PRECISION = 10
+-- kelp.ROLL_GROWTH_NUMERATOR = 216 * kelp.TICK * kelp.ROLL_GROWTH_PRECISION
+-- kelp.ROLL_GROWTH_DENOMINATOR = 100 * 1200 * kelp.ROLL_GROWTH_PRECISION
+kelp.ROLL_GROWTH_PRECISION = 1
+kelp.ROLL_GROWTH_NUMERATOR = 216 * kelp.TICK
+kelp.ROLL_GROWTH_DENOMINATOR = 100 * 1200
+
+-- Sounds used to dig and place kelp.
+kelp.leaf_sounds = mcl_sounds.node_sound_leaves_defaults()
+
+-- Pool storing nodetimers
+kelp.timers_pool = {}
+
+-- Pool storing age, indexed by pos_hash.
+kelp.age_pool = {}
+
+-- Queue(List) of hashed positions to save their ages.
+-- Invalid ones may still persist in this queue.
+kelp.age_queue = {}
+-- Stores only valid positions of each hashed postiions.
+kelp.age_queue_pos = {}
+
+
+-- is age in the growable range?
+function kelp.is_age_growable(age)
+	return age >= 0 and age < kelp.MAX_AGE
 end
 
-local function get_submerged(node_water)
-	local def_water = minetest.registered_nodes[node_water.name]
-	-- Submerged in water?
-	if minetest.get_item_group(node_water.name, "water") then
-		if def_water.liquidtype == "source" then
-			return "source"
-		elseif def_water.liquidtype == "flowing" then
-			return "flowing"
-		end
+
+-- Is this water?
+-- Returns the liquidtype, if indeed water.
+function kelp.is_submerged(node)
+	if mt_get_item_group(node.name, "water") ~= 0 then
+		-- Expected only "source" and "flowing" from water liquids
+		return mt_registered_nodes[node.name].liquidtype
 	end
 	return false
 end
 
-local function grow_param2_step(param2, snap_into_grid)
-	local old_param2 = param2
-	param2 = param2 + 16
-	if param2 > 240 then
-		param2 = 240
+
+-- Is the water downward flowing?
+-- (kelp can grow/be placed inside downward flowing water)
+function kelp.is_downward_flowing(pos, node, pos_above, node_above, __is_above__)
+	-- Function params: (pos[, node]) or (node, pos_above) or (node, node_above)
+	local node = node or mt_get_node(pos)
+
+	local result = (math_floor(node.param2 / 8) % 2) == 1
+	if not (result or __is_above__) then
+		-- If not, also check node above.
+		-- (this is needed due a weird quirk in the definition of "downwards flowing"
+		-- liquids in Minetest)
+		local pos_above = pos_above or {x=pos.x,y=pos.y+1,z=pos.z}
+		local node_above = node_above or mt_get_node(pos_above)
+		result = kelp.is_submerged(node_above)
+			or kelp.is_downward_flowing(nil, node_above, nil, nil, true)
 	end
-	if snap_into_grid and (param2 % 16 ~= 0) then
-		param2 = param2 - (param2 % 16)
-	end
-	return param2, param2 ~= old_param2
+	return result
 end
 
-local function kelp_check_place(pos_above, node_above, def_above)
-	if minetest.get_item_group(node_above.name, "water") == 0 then
+
+-- Will node fall at that position?
+-- This only checks if a node would fall, meaning that node need not be at pos.
+function kelp.is_falling(pos, node, is_falling, pos_bottom, node_bottom, def_bottom)
+	-- Optional params: is_falling, pos_bottom, node_bottom, def_bottom
+
+	-- NOTE: Modified from check_single_for_falling in builtin.
+	-- Please update accordingly.
+	local nodename = node.name
+
+	if is_falling == false or
+		is_falling == nil and mt_get_item_group(nodename, "falling_node") == 0 then
 		return false
 	end
-	local can_place = false
-	if (def_above.liquidtype == "source") then
-		can_place = true
-	elseif (def_above.liquidtype == "flowing") then
-		-- Check if bit 3 (downwards flowing) is set
-		can_place = (math.floor(node_above.param2 / 8) % 2) == 1
-		if not can_place then
-			-- If not, also check node above (this is needed due a weird quirk in the definition of
-			-- "downwards flowing" liquids in Minetest)
-			local node_above_above = minetest.get_node({x=pos_above.x,y=pos_above.y+1,z=pos_above.z})
-			local naa_def = minetest.registered_nodes[node_above_above.name]
-			can_place = naa_def.liquidtype == "source"
-			if not can_place then
-				can_place = (naa_def.liquidtype == "flowing") and ((math.floor(node_above_above.param2 / 8) % 2) == 1)
-			end
-		end
+
+	local pos_bottom = pos_bottom or {x = pos.x, y = pos.y - 1, z = pos.z}
+	-- get_node_or_nil: Only fall if node below is loaded
+	local node_bottom = node_bottom or mt_get_node_or_nil(pos_bottom)
+	local nodename_bottom = node_bottom.name
+	local def_bottom = def_bottom or node_bottom and mt_registered_nodes[nodename_bottom]
+	if not def_bottom then
+		return false
 	end
-	return can_place
+
+	local same = nodename == nodename_bottom
+	-- Let leveled nodes fall if it can merge with the bottom node
+	if same and def_bottom.paramtype2 == "leveled" and
+			mt_get_node_level(pos_bottom) <
+			mt_get_node_max_level(pos_bottom) then
+		return true
+	end
+
+	-- Otherwise only if the bottom node is considered "fall through"
+	if not same and
+			(not def_bottom.walkable or def_bottom.buildable_to) and
+			(mt_get_item_group(nodename, "float") == 0 or
+			def_bottom.liquidtype == "none") then
+		return true
+	end
+
+	return false
 end
 
-local function kelp_on_place(itemstack, placer, pointed_thing)
+
+-- Roll whether to grow kelp or not.
+function kelp.roll_growth(numerator, denominator)
+	-- Optional params: numerator, denominator
+	return math_random(denominator or kelp.ROLL_GROWTH_DENOMINATOR) <= (numerator or kelp.ROLL_GROWTH_NUMERATOR)
+end
+
+
+-- Roll initial age for kelp.
+function kelp.roll_init_age(min, max)
+	-- Optional params
+	return math_random(min or kelp.MIN_AGE, (max or kelp.MAX_AGE)-1)
+end
+
+
+-- Converts param2 to kelp height.
+function kelp.get_height(param2)
+	return math_floor(param2 / 16)
+end
+
+
+-- Obtain pos and node of the tip of kelp.
+function kelp.get_tip(pos, param2)
+	-- Optional params: param2
+	local height = kelp.get_height(param2 or mt_get_node(pos).param2)
+	local pos_tip = {x=pos.x, y=pos.y, z=pos.z}
+	pos_tip.y = pos_tip.y + height + 1
+	return pos_tip, mt_get_node(pos_tip), height
+end
+
+
+-- Obtain position of the first kelp unsubmerged.
+function kelp.find_unsubmerged(pos, node, height)
+	-- Optional params: node, height
+	local node = node or mt_get_node(pos)
+	local height = height or kelp.get_height(node.param2)
+
+	local walk_pos = {x=pos.x, z=pos.z}
+	local y = pos.y
+	for i=1,height do
+		walk_pos.y = y + i
+		local walk_node = mt_get_node(walk_pos)
+		if not kelp.is_submerged(walk_node) then
+			return walk_pos, walk_node, height, i
+		end
+	end
+	return nil, nil, height, height
+end
+
+
+-- Obtain next param2.
+function kelp.next_param2(param2)
+	return param2+16 - param2 % 16
+end
+
+
+-- Stores age from kelp.age_queue* into their respective meta
+function kelp.store_meta()
+	local count = 0
+	for _ in pairs(kelp.age_queue_pos) do
+		count = count + 1
+	end
+	-- chatlog(string_format("Storing age metadata: %d in queue", #kelp.age_queue))
+	-- chatlog(string_format("Storing age metadata: %d valid in queue", count))
+	for i=1,#kelp.age_queue do
+		local pos_hash = kelp.age_queue[i]
+		local pos = kelp.age_queue_pos[pos_hash]
+		-- queued hashes may no longer point to a valid pos, e.g. kelp is destroyed.
+		if pos then
+			mt_get_meta(pos):set_int("mcl_ocean:kelp_age", kelp.age_pool[pos_hash])
+		end
+	end
+	kelp.age_queue = {}
+	kelp.age_queue_pos = {}
+end
+
+
+-- Store and queue a kelp's age to be saved into meta later.
+function kelp.store_age(age, pos, pos_hash)
+	-- Watched params: pos
+	-- Optional params: pos_hash
+	local pos_hash = pos_hash or mt_hash_node_position(pos)
+
+	kelp.age_pool[pos_hash] = age
+	if not kelp.age_queue_pos[pos_hash] then
+		table_insert(kelp.age_queue, pos_hash)
+		kelp.age_queue_pos[pos_hash] = pos
+		return true, pos_hash
+	end
+
+	return false, pos_hash
+end
+
+
+-- Initialise a kelp's age.
+function kelp.init_age(pos, age, pos_hash, meta)
+	-- Watched params: pos
+	-- Optional params: age, pos_hash, meta
+	local pos_hash = pos_hash or mt_hash_node_position(pos)
+	local meta = meta or mt_get_meta(pos)
+
+	local age = age
+	if age then
+		kelp.store_age(age, pos, pos_hash)
+	elseif not meta:contains("mcl_ocean:kelp_age") then
+		age = kelp.roll_init_age()
+		kelp.store_age(age, pos, pos_hash)
+	else
+		age = meta:get_int("mcl_ocean:kelp_age")
+		if not kelp.age_pool[pos_hash] then
+			kelp.age_pool[pos_hash] = age
+		end
+	end
+
+	return age, pos_hash, meta
+end
+
+
+-- Initialise kelp nodetimer.
+function kelp.init_timer(pos, pos_hash)
+	-- Optional params: pos_hash
+	local pos_hash = pos_hash or mt_hash_node_position(pos)
+
+	local timer = kelp.timers_pool[pos_hash]
+	if not timer then
+		timer = mt_get_node_timer(pos)
+		kelp.timers_pool[pos_hash] = timer
+	end
+	if not timer:is_started() then
+		timer:start(kelp.TICK)
+	end
+
+	return pos_hash
+end
+
+
+-- Apply next kelp height.
+function kelp.next_height(pos, node, pos_tip, node_tip, submerged, downward_flowing)
+	-- Modified params: node
+	-- Optional params: node, set_node, pos_tip, node_tip, submerged, downward_flowing
+	local node = node or mt_get_node(pos)
+	local pos_tip = pos_tip
+	local node_tip = node_tip or (pos_tip and mt_get_node(pos_tip))
+	if not pos_tip then
+		pos_tip,node_tip = kelp.get_tip(pos)
+	end
+	local downward_flowing = downward_flowing or
+		(submerged or kelp.is_submerged(node_tip)
+		 and kelp.is_downward_flowing(pos_tip, node_tip))
+
+	-- Liquid source: Grow normally.
+	node.param2 = kelp.next_param2(node.param2)
+	mt_swap_node(pos, node)
+
+	-- Flowing liquid: Grow 1 step, but also turn the tip node into a liquid source.
+	if downward_flowing then
+		local alt_liq = mt_registered_nodes[node_tip.name].liquid_alternative_source
+		if alt_liq then
+			mt_set_node(pos_tip, {name=alt_liq})
+		end
+	end
+
+	return node, pos_tip, node_tip, submerged, downward_flowing
+end
+
+
+-- Grow next kelp.
+function kelp.next_grow(age, pos, node, pos_hash, pos_tip, node_tip, submerged, downward_flowing)
+	-- Watched params: pos
+	-- Modified params: node
+	-- Optional params: node, pos_hash, pos_tip, node_tip, submerged, downward_flowing
+	local node = node or mt_get_node(pos)
+	local pos_hash = pos_hash or mt_hash_node_position(pos)
+	local pos_tip = pos_tip
+	local node_tip = node_tip or (pos_tip and mt_get_node(pos_tip))
+	if not pos_tip then
+		pos_tip,node_tip = kelp.get_tip(pos)
+	end
+
+	-- New kelp must also be submerged in water.
+	local downward_flowing = downward_flowing or kelp.is_downward_flowing(pos_tip, node_tip)
+	if not (submerged or kelp.is_submerged(node_tip)) then
+		return
+	end
+
+	kelp.next_height(pos, node, pos_tip, node_tip, submerged, downward_flowing)
+
+	return kelp.store_age(age, pos, pos_hash), node, pos_hash, pos_tip, node_tip, submerged, downward_flowing
+end
+
+
+-- Drops the items for detached kelps.
+function kelp.detach_drop(pos, param2)
+	-- Optional params: param2
+	local height = kelp.get_height(param2 or mt_get_node(pos).param2)
+	local y = pos.y
+	local walk_pos = {x=pos.x, z=pos.z}
+	for i=1,height do
+		walk_pos.y = y+i
+		mt_add_item(walk_pos, "mcl_ocean:kelp")
+	end
+	return true
+end
+
+
+-- Detach the kelp at dig_pos, and drop their items.
+-- Synonymous to digging the kelp.
+-- NOTE: this is intended for whenever kelp truly becomes segmented plants
+-- instead of rooted to the floor. Don't try to remove dig_pos.
+function kelp.detach_dig(dig_pos, pos, node, drop)
+	-- Optional params: drop
+
+	local param2 = node.param2
+	-- pos.y points to the surface, offset needed to point to the first kelp.
+	local new_height = dig_pos.y - (pos.y+1)
+
+	-- Digs the entire kelp.
+	if new_height <= 0 then
+		if drop then
+			kelp.detach_drop(dig_pos, param2)
+		end
+		mt_set_node(pos, {
+			name=mt_registered_nodes[node.name].node_dig_prediction,
+			param=node.param,
+			param2=0 })
+
+	-- Digs the kelp beginning at a height.
+	else
+		if drop then
+			kelp.detach_drop(dig_pos, param2 - new_height)
+		end
+		mt_swap_node(pos, {name=node.name, param=node.param, param2=16*new_height})
+	end
+end
+
+
+--------------------------------------------------------------------------------
+-- Kelp callback functions
+--------------------------------------------------------------------------------
+
+function kelp.surface_on_dig(pos, node, digger)
+	kelp.detach_dig(pos, pos, node, true)
+end
+
+
+function kelp.surface_after_dig_node(pos, node)
+	return mt_set_node(pos, {name=registred_nodes[node.name].node_dig_prediction})
+end
+
+
+function kelp.surface_on_timer(pos)
+	local node = mt_get_node(pos)
+	local pos_hash
+
+	-- Update detahed kelps
+	local dig_pos = kelp.find_unsubmerged(pos, node)
+	if dig_pos then
+		pos_hash = mt_hash_node_position(pos)
+		mt_sound_play(mt_registered_nodes[node.name].sounds.dug, { gain = 0.5, pos = dig_pos }, true)
+		kelp.detach_dig(dig_pos, pos, node, true)
+		kelp.store_age(kelp.roll_init_age(), pos, pos_hash)
+	end
+
+	-- Grow kelp on chance
+	if kelp.roll_growth() then
+		pos_hash = pos_hash or mt_hash_node_position(pos)
+		local age = kelp.age_pool[pos_hash]
+		if kelp.is_age_growable(age) then
+			kelp.next_grow(age+1, pos, node, pos_hash)
+		end
+	end
+
+	return true
+end
+
+function kelp.surface_on_construct(pos)
+	local pos_hash = mt_hash_node_position(pos)
+	kelp.init_age(pos, nil, pos_hash)
+	kelp.init_timer(pos, pos_hash)
+end
+
+
+function kelp.surface_on_destruct(pos)
+	local node = mt_get_node(pos)
+	local pos_hash = mt_hash_node_position(pos)
+
+	-- on_falling callback. Activated by pistons for falling nodes too.
+	if kelp.is_falling(pos, node) then
+		kelp.detach_drop(pos, node.param2)
+	end
+
+	-- Removes position from queue
+	kelp.age_queue_pos[pos_hash] = nil
+end
+
+
+
+function kelp.surface_on_mvps_move(pos, node, oldpos, nodemeta)
+	-- Pistons moving falling nodes will have already activated on_falling callback.
+	kelp.detach_dig(pos, pos, node, mt_get_item_group(node.name, "falling_node") ~= 1)
+end
+
+
+-- NOTE: Old ABM implementation.
+-- local function surface_unsubmerged_abm(pos, node)
+-- 	local dig_pos = find_unsubmerged(pos, node)
+-- 	if dig_pos then
+-- 		detach_dig(dig_pos, pos, node, true)
+-- 	end
+-- 	return true
+-- end
+
+
+function kelp.kelp_on_place(itemstack, placer, pointed_thing)
 	if pointed_thing.type ~= "node" or not placer then
 		return itemstack
 	end
@@ -73,183 +496,251 @@ local function kelp_on_place(itemstack, placer, pointed_thing)
 	local player_name = placer:get_player_name()
 	local pos_under = pointed_thing.under
 	local pos_above = pointed_thing.above
-	local node_under = minetest.get_node(pos_under)
-	local node_above = minetest.get_node(pos_above)
-	local def_under = minetest.registered_nodes[node_under.name]
-	local def_above = minetest.registered_nodes[node_above.name]
+	local node_under = mt_get_node(pos_under)
+	local nu_name = node_under.name
+	local def_under = mt_registered_nodes[nu_name]
 
+	-- Allow rightclick to override place.
 	if def_under and def_under.on_rightclick and not placer:get_player_control().sneak then
 		return def_under.on_rightclick(pos_under, node_under,
 				placer, itemstack, pointed_thing) or itemstack
 	end
 
-	if minetest.is_protected(pos_under, player_name) or
-			minetest.is_protected(pos_above, player_name) then
-		minetest.log("action", player_name
+	-- Protection
+	if mt_is_protected(pos_under, player_name) or
+			mt_is_protected(pos_above, player_name) then
+		mt_log("action", player_name
 			.. " tried to place " .. itemstack:get_name()
 			.. " at protected position "
-			.. minetest.pos_to_string(pos_under))
-		minetest.record_protection_violation(pos_under, player_name)
+			.. mt_pos_to_string(pos_under))
+		mt_record_protection_violation(pos_under, player_name)
 		return itemstack
 	end
 
-	local grow_kelp = false
-	-- Select a kelp node when placed on surface node
-	if node_under.name == "mcl_core:dirt" then
-		node_under.name = "mcl_ocean:kelp_dirt"
-	elseif node_under.name == "mcl_core:sand" then
-		node_under.name = "mcl_ocean:kelp_sand"
-	elseif node_under.name == "mcl_core:redsand" then
-		node_under.name = "mcl_ocean:kelp_redsand"
-	elseif node_under.name == "mcl_core:gravel" then
-		node_under.name = "mcl_ocean:kelp_gravel"
-	elseif minetest.get_item_group(node_under.name, "kelp") == 1 then
-		-- Place kelp on kelp = grow kelp by 1 node length
-		node_under.param2, grow_kelp = grow_param2_step(node_under.param2)
-		if not grow_kelp then
-			return itemstack
-		end
-	else
+
+	local pos_tip, node_tip, def_tip, new_kelp
+	-- Kelp must also be placed on the top/tip side of the surface/kelp
+	if pos_under.y >= pos_above.y then
 		return itemstack
 	end
-	local submerged = false
-	if grow_kelp then
-		-- Kelp placed on kelp ...
-		-- Kelp can be placed on top of another kelp to make it grow
-		if pos_under.y >= pos_above.y or pos_under.x ~= pos_above.x or pos_under.z ~= pos_above.z then
-			-- Placed on side or below node, abort
-			return itemstack
-		end
-		-- New kelp top must also be submerged in water
-		local top_pos, top_node = get_kelp_top(pos_under, node_under)
-		local top_def = minetest.registered_nodes[top_node.name]
-		submerged = kelp_check_place(top_pos, top_node, top_def)
-		if not submerged then
-			-- Not submerged in water, abort
-			return itemstack
-		end
+
+	-- When placed on kelp.
+	if mt_get_item_group(nu_name, "kelp") == 1 then
+		pos_tip,node_tip = kelp.get_tip(pos_under, node_under.param2)
+		def_tip = mt_registered_nodes[node_tip.name]
+
+	-- When placed on surface.
 	else
-		-- New kelp placed ...
-		if pos_under.y >= pos_above.y then
-			-- Placed on side or below node, abort
+		new_kelp = false
+		for _,surface in pairs(kelp.surfaces) do
+			if nu_name == surface.nodename then
+				node_under.name = "mcl_ocean:kelp_" ..surface.name
+				node_under.param2 = 0
+				new_kelp = true
+				break
+			end
+		end
+		-- Surface must support kelp
+		if not new_kelp then
 			return itemstack
 		end
-		-- Kelp can be placed inside a water source or water flowing downwards on top of a surface node
-		local can_place = kelp_check_place(pos_above, node_above, def_above)
-		if not can_place then
-			return itemstack
-		end
-		node_under.param2 = minetest.registered_items[node_under.name].place_param2 or 16
+
+		pos_tip = pos_above
+		node_tip = mt_get_node(pos_above)
+		def_tip = mt_registered_nodes[node_tip.name]
 	end
-	-- Place or grow kelp
-	local def_node = minetest.registered_items[node_under.name]
+
+	-- New kelp must also be submerged in water.
+	local downward_flowing = kelp.is_downward_flowing(pos_tip, node_tip)
+	local submerged = kelp.is_submerged(node_tip)
+	if not submerged then
+		return itemstack
+	end
+
+	-- Play sound, place surface/kelp and take away an item
+	local def_node = mt_registered_items[nu_name]
 	if def_node.sounds then
-		minetest.sound_play(def_node.sounds.place, { gain = 0.5, pos = pos_under }, true)
+		mt_sound_play(def_node.sounds.place, { gain = 0.5, pos = pos_under }, true)
 	end
-	minetest.set_node(pos_under, node_under)
-	if not minetest.is_creative_enabled(player_name) then
+	kelp.next_height(pos_under, node_under, pos_tip, node_tip, def_tip, submerged, downward_flowing)
+	if not mt_is_creative_enabled(player_name) then
 		itemstack:take_item()
 	end
 
+	-- Initialize age and timer when it's a new kelp
+	local pos_hash = mt_hash_node_position(pos_under)
+	if new_kelp then
+		kelp.init_age(pos_under, nil, pos_hash)
+		kelp.init_timer(pos_under, pos_hash)
+	else
+		kelp.store_age(kelp.roll_init_age(), pos_under, pos_hash)
+	end
+
 	return itemstack
 end
 
-local get_kelp_height = function(param2)
-	return math.floor(param2 / 16)
+
+function kelp.lbm_register_nodetimer(pos, node)
+	local pos_hash = mt_hash_node_position(pos)
+	kelp.init_age(pos, nil, pos_hash)
+	kelp.init_timer(pos, pos_hash)
 end
 
+
+local gstep_time = 0
+function kelp.globalstep(dtime)
+	if #kelp.age_queue > kelp.MAX_AGE_QUEUE then
+		kelp.store_meta()
+	end
+
+	gstep_time = gstep_time + dtime
+	if gstep_time < kelp.META_TICK then
+		return
+	end
+	gstep_time = 0
+
+	if #kelp.age_queue > 0 then
+		kelp.store_meta()
+	end
+end
+
+
+function kelp.on_shutdown()
+	if #kelp.age_queue > 0 then
+		kelp.store_meta()
+	end
+end
+
+--------------------------------------------------------------------------------
+-- Kelp registration API
+--------------------------------------------------------------------------------
+
+-- List of supported surfaces for seagrass and kelp.
+kelp.surfaces = {
+	{ name="dirt",    nodename="mcl_core:dirt",    },
+	{ name="sand",    nodename="mcl_core:sand",    },
+	{ name="redsand", nodename="mcl_core:redsand", },
+	{ name="gravel",  nodename="mcl_core:gravel",  },
+}
+kelp.registered_surfaces = {}
+
+-- Commented properties are the ones obtained using register_kelp_surface.
+-- If you define your own properties, it overrides the default ones.
+kelp.surface_deftemplate = {
+	drawtype = "plantlike_rooted",
+	paramtype = "light",
+	paramtype2 = "leveled",
+	place_param2 = 16,
+	--tiles = def.tiles,
+	special_tiles = {
+		{
+		image = "mcl_ocean_kelp_plant.png",
+		animation = {type="vertical_frames", aspect_w=16, aspect_h=16, length=2.0},
+		tileable_vertical = true,
+		}
+	},
+	--inventory_image = "("..def.tiles[1]..")^mcl_ocean_kelp_item.png",
+	wield_image = "mcl_ocean_kelp_item.png",
+	selection_box = {
+		type = "fixed",
+		fixed = {
+			{ -0.5, -0.5, -0.5, 0.5, 0.5, 0.5 },
+			{ -0.5, 0.5, -0.5, 0.5, 1.5, 0.5 },
+		},
+	},
+	-- groups.falling_node = is_falling,
+	groups = { dig_immediate = 3, deco_block = 1, plant = 1, kelp = 1, },
+	--sounds = sounds,
+	--node_dig_prediction = nodename,
+	on_construct = kelp.surface_on_construct,
+	on_destruct = kelp.surface_on_destruct,
+	on_dig = kelp.surface_on_dig,
+	after_dig_node = kelp.surface_after_dig_node,
+	on_timer = kelp.surface_on_timer,
+	mesecon = { on_mvps_move = kelp.surface_on_mvps_move, },
+	drop = "", -- drops are handled in on_dig
+	--_mcl_falling_node_alternative = is_falling and nodename or nil,
+	_mcl_hardness = 0,
+	_mcl_blast_resistance = 0,
+}
+
+-- Commented properties are the ones obtained using register_kelp_surface.
+kelp.surface_docs = {
+	-- entry_id_orig = nodename,
+	_doc_items_entry_name = S("Kelp"),
+	_doc_items_longdesc = S("Kelp grows inside water on top of dirt, sand or gravel."),
+	--_doc_items_create_entry = doc_create,
+	_doc_items_image = "mcl_ocean_kelp_item.png",
+}
+
+-- Creates new surfaces.
+-- NOTE: surface_deftemplate will be modified in-place.
+function kelp.register_kelp_surface(surface, surface_deftemplate, surface_docs)
+	local name = surface.name
+	local nodename = surface.nodename
+	local def = mt_registered_nodes[nodename]
+	local def_tiles = def.tiles
+
+	local surfacename = "mcl_ocean:kelp_"..name
+	local surface_deftemplate = surface_deftemplate or kelp.surface_deftemplate -- Optional param
+
+	local doc_create = surface.doc_create or false
+	local surface_docs = surface_docs or kelp.surface_docs -- Optional param
+
+	if doc_create then
+		surface_deftemplate._doc_items_entry_name = surface_docs._doc_items_entry_name
+		surface_deftemplate._doc_items_longdesc = surface_docs._doc_items_longdesc
+		surface_deftemplate._doc_items_create_entry = true
+		surface_deftemplate._doc_items_image = surface_docs._doc_items_image
+		-- Sets the first surface as the docs' entry ID
+		if not surface_docs.entry_id_orig then
+			surface_docs.entry_id_orig = nodename
+		end
+	elseif mod_doc then
+		doc.add_entry_alias("nodes", surface_docs.entry_id_orig, "nodes", surfacename)
+	end
+
+	local sounds = table_copy(def.sounds)
+	sounds.dig = kelp.leaf_sounds.dig
+	sounds.dug = kelp.leaf_sounds.dug
+	sounds.place = kelp.leaf_sounds.place
+
+	surface_deftemplate.tiles = surface_deftemplate.tiles or def_tiles
+	surface_deftemplate.inventory_image = surface_deftemplate.inventory_image or "("..def_tiles[1]..")^mcl_ocean_kelp_item.png"
+	surface_deftemplate.sounds = surface_deftemplate.sound or sounds
+	local falling_node = mt_get_item_group(nodename, "falling_node")
+	surface_deftemplate.node_dig_prediction = surface_deftemplate.node_dig_prediction or nodename
+	surface_deftemplate.groups.falling_node = surface_deftemplate.groups.falling_node or falling_node
+	surface_deftemplate._mcl_falling_node_alternative = surface_deftemplate._mcl_falling_node_alternative or (falling_node and nodename or nil)
+
+	minetest.register_node(surfacename, surface_deftemplate)
+end
+
+-- Kelp surfaces nodes ---------------------------------------------------------
+
+-- Dirt must be registered first, for the docs
+kelp.register_kelp_surface(kelp.surfaces[1], table_copy(kelp.surface_deftemplate), kelp.surface_docs)
+for i=2, #kelp.surfaces do
+	kelp.register_kelp_surface(kelp.surfaces[i], table_copy(kelp.surface_deftemplate), kelp.surface_docs)
+end
+
+-- Kelp item -------------------------------------------------------------------
+
 minetest.register_craftitem("mcl_ocean:kelp", {
 	description = S("Kelp"),
 	_tt_help = S("Grows in water on dirt, sand, gravel"),
 	_doc_items_create_entry = false,
 	inventory_image = "mcl_ocean_kelp_item.png",
 	wield_image = "mcl_ocean_kelp_item.png",
-	on_place = kelp_on_place,
+	on_place = kelp.kelp_on_place,
 	groups = { deco_block = 1 },
 })
 
--- Kelp nodes: kelp on a surface node
-
-for s=1, #surfaces do
-	local def = minetest.registered_nodes[surfaces[s][2]]
-	local alt
-	if surfaces[s][3] == 1 then
-		alt = surfaces[s][2]
-	end
-	local sounds = table.copy(def.sounds)
-	local leaf_sounds = mcl_sounds.node_sound_leaves_defaults()
-	sounds.dig = leaf_sounds.dig
-	sounds.dug = leaf_sounds.dug
-	sounds.place = leaf_sounds.place
-	local tt_help, doc_longdesc, doc_img, desc
-	if surfaces[s][1] == "dirt" then
-		doc_longdesc = S("Kelp grows inside water on top of dirt, sand or gravel.")
-		desc = S("Kelp")
-		doc_create = true
-		doc_img = "mcl_ocean_kelp_item.png"
-	else
-		doc_create = false
-	end
-	minetest.register_node("mcl_ocean:kelp_"..surfaces[s][1], {
-		_doc_items_entry_name = desc,
-		_doc_items_longdesc = doc_longdesc,
-		_doc_items_create_entry = doc_create,
-		_doc_items_image = doc_img,
-		drawtype = "plantlike_rooted",
-		paramtype = "light",
-		paramtype2 = "leveled",
-		place_param2 = 16,
-		tiles = def.tiles,
-		special_tiles = {
-			{
-			image = "mcl_ocean_kelp_plant.png",
-			animation = {type="vertical_frames", aspect_w=16, aspect_h=16, length=2.0},
-			tileable_vertical = true,
-			}
-		},
-		inventory_image = "("..def.tiles[1]..")^mcl_ocean_kelp_item.png",
-		wield_image = "mcl_ocean_kelp_item.png",
-		selection_box = {
-			type = "fixed",
-			fixed = {
-				{ -0.5, -0.5, -0.5, 0.5, 0.5, 0.5 },
-				{ -0.5, 0.5, -0.5, 0.5, 1.5, 0.5 },
-			},
-		},
-		groups = { dig_immediate = 3, deco_block = 1, plant = 1, kelp = 1, falling_node = surfaces[s][3] },
-		sounds = sounds,
-		node_dig_prediction = surfaces[s][2],
-		after_dig_node = function(pos)
-			minetest.set_node(pos, {name=surfaces[s][2]})
-		end,
-		on_dig = function(pos, node, digger)
-			-- Drop kelp as item; item count depends on height
-			local dname = ""
-			if digger then
-				dname = digger:get_player_name()
-			end
-			local creative = minetest.is_creative_enabled(dname)
-			if not creative then
-				minetest.add_item({x=pos.x, y=pos.y+1, z=pos.z}, "mcl_ocean:kelp "..get_kelp_height(node.param2))
-			end
-			minetest.node_dig(pos, node, digger)
-		end,
-		drop = "", -- drops are handled in on_dig
-		_mcl_falling_node_alternative = alt,
-		_mcl_hardness = 0,
-		_mcl_blast_resistance = 0,
-	})
-
-	if mod_doc and surfaces[s][1] ~= "dirt" then
-		doc.add_entry_alias("nodes", "mcl_ocean:kelp_dirt", "nodes", "mcl_ocean:kelp_"..surfaces[s][1])
-	end
-end
-
 if mod_doc then
-	doc.add_entry_alias("nodes", "mcl_ocean:kelp_dirt", "craftitems", "mcl_ocean:kelp")
+	doc.add_entry_alias("nodes", kelp.surface_docs.entry_id_orig, "craftitems", "mcl_ocean:kelp")
 end
 
--- Dried kelp stuff
+-- Dried kelp ------------------------------------------------------------------
 
 -- TODO: This is supposed to be eaten very fast
 minetest.register_craftitem("mcl_ocean:dried_kelp", {
@@ -264,13 +755,13 @@ minetest.register_craftitem("mcl_ocean:dried_kelp", {
 	_mcl_saturation = 0.6,
 })
 
+
 local mod_screwdriver = minetest.get_modpath("screwdriver") ~= nil
 local on_rotate
 if mod_screwdriver then
 	on_rotate = screwdriver.rotate_3way
 end
 
-
 minetest.register_node("mcl_ocean:dried_kelp_block", {
 	description = S("Dried Kelp Block"),
 	_doc_items_longdesc = S("A decorative block that serves as a great furnace fuel."),
@@ -310,32 +801,35 @@ minetest.register_craft({
 	burntime = 200,
 })
 
--- Grow kelp
-minetest.register_abm({
-	label = "Kelp growth",
+-- Global registration ------------------------------------------------------------------------
+
+minetest.register_lbm({
+	label = "Kelp initialise",
+	name = "mcl_ocean:kelp_init",
 	nodenames = { "group:kelp" },
-	interval = 45,
-	chance = 12,
-	catch_up = false,
-	action = function(pos, node, active_object_count, active_object_count_wider)
-		local grown
-		-- Grow kelp by 1 node length if it would grow inside water
-		node.param2, grown = grow_param2_step(node.param2, true)
-		local top, top_node = get_kelp_top(pos, node)
-		local submerged = get_submerged(top_node)
-		if grown then
-			if submerged == "source" then
-				-- Liquid source: Grow normally
-				minetest.set_node(pos, node)
-			elseif submerged == "flowing" then
-				-- Flowing liquid: Grow 1 step, but also turn the top node into a liquid source
-				minetest.set_node(pos, node)
-				local def_liq = minetest.registered_nodes[top_node.name]
-				local alt_liq = def_liq and def_liq.liquid_alternative_source
-				if alt_liq then
-					minetest.set_node(top, {name=alt_liq})
-				end
-			end
-		end
-	end,
+	run_at_every_load = true, -- so old kelps are also initialised
+	action = kelp.lbm_register_nodetimer,
 })
+
+
+minetest.register_globalstep(kelp.globalstep)
+minetest.register_on_shutdown(kelp.on_shutdown)
+
+-- NOTE: Old ABM implementation.
+-- minetest.register_abm({
+-- 	label = "Kelp drops",
+-- 	nodenames = { "group:kelp" },
+-- 	interval = 1.0,
+-- 	chance = 1,
+-- 	catch_up = false,
+-- 	action = surface_unsubmerged_abm,
+-- })
+--
+-- minetest.register_abm({
+-- 	label = "Kelp growth",
+-- 	nodenames = { "group:kelp" },
+-- 	interval = 45,
+-- 	chance = 12,
+-- 	catch_up = false,
+-- 	action = grow_abm,
+-- })
diff --git a/mods/ITEMS/mcl_portals/portal_end.lua b/mods/ITEMS/mcl_portals/portal_end.lua
index 0bc0ce57e..ab09c5966 100644
--- a/mods/ITEMS/mcl_portals/portal_end.lua
+++ b/mods/ITEMS/mcl_portals/portal_end.lua
@@ -4,11 +4,6 @@ local S = minetest.get_translator("mcl_portals")
 local SPAWN_MIN = mcl_vars.mg_end_min+70
 local SPAWN_MAX = mcl_vars.mg_end_min+98
 
-local PORTAL_ALPHA = 192
-if minetest.features.use_texture_alpha_string_modes then
-	PORTAL_ALPHA = nil
-end
-
 local mg_name = minetest.get_mapgen_setting("mg_name")
 
 local destroy_portal = function(pos)
@@ -81,7 +76,6 @@ minetest.register_node("mcl_portals:portal_end", {
 	-- This is 15 in MC.
 	light_source = 14,
 	post_effect_color = {a = 192, r = 0, g = 0, b = 0},
-	alpha = PORTAL_ALPHA,
 	after_destruct = destroy_portal,
 	-- This prevents “falling through”
 	collision_box = {
diff --git a/mods/ITEMS/mcl_portals/portal_nether.lua b/mods/ITEMS/mcl_portals/portal_nether.lua
index e842edf81..50a3bde39 100644
--- a/mods/ITEMS/mcl_portals/portal_nether.lua
+++ b/mods/ITEMS/mcl_portals/portal_nether.lua
@@ -30,7 +30,6 @@ local N_Y_MIN, N_Y_MAX			= mcl_vars.mg_bedrock_nether_bottom_min, mcl_vars.mg_be
 local O_DY, N_DY			= O_Y_MAX - O_Y_MIN + 1, N_Y_MAX - N_Y_MIN + 1
 
 -- Alpha and particles
-local ALPHA = minetest.features.use_texture_alpha_string_modes and 192
 local node_particles_allowed = minetest.settings:get("mcl_node_particles") or "none"
 local node_particles_levels = { none=0, low=1, medium=2, high=3 }
 local PARTICLES = node_particles_levels[node_particles_allowed]
@@ -263,7 +262,6 @@ minetest.register_node(PORTAL, {
 	drop = "",
 	light_source = 11,
 	post_effect_color = {a = 180, r = 51, g = 7, b = 89},
-	alpha = ALPHA,
 	node_box = {
 		type = "fixed",
 		fixed = {
diff --git a/mods/ITEMS/mcl_throwing/API.md b/mods/ITEMS/mcl_throwing/API.md
index f2b1c7374..41a47223a 100644
--- a/mods/ITEMS/mcl_throwing/API.md
+++ b/mods/ITEMS/mcl_throwing/API.md
@@ -33,3 +33,9 @@ Handle creative mode, and throw params.
 
 * entity_name: the name of the entity to throw
 * velocity: (optional) velocity overide (can be nil)
+
+## mcl_throwing.get_staticdata(self)
+Must be used in entity def if you want the entity to be saved after unloading mapblock.
+
+## mcl_throwing.on_activate(self, staticdata, dtime_s)
+Must be used in entity def if you want the entity to be saved after unloading mapblock.
diff --git a/mods/ITEMS/mcl_throwing/init.lua b/mods/ITEMS/mcl_throwing/init.lua
index 4d6dcfe5c..09a34c12f 100644
--- a/mods/ITEMS/mcl_throwing/init.lua
+++ b/mods/ITEMS/mcl_throwing/init.lua
@@ -58,7 +58,7 @@ function mcl_throwing.dispense_function(stack, dispenserpos, droppos, dropnode,
 end
 
 -- Staticdata handling because objects may want to be reloaded
-local get_staticdata = function(self)
+function mcl_throwing.get_staticdata(self)
 	local thrower
 	-- Only save thrower if it's a player name
 	if type(self._thrower) == "string" then
@@ -71,7 +71,7 @@ local get_staticdata = function(self)
 	return minetest.serialize(data)
 end
 
-local on_activate = function(self, staticdata, dtime_s)
+function mcl_throwing.on_activate(self, staticdata, dtime_s)
 	local data = minetest.deserialize(staticdata)
 	if data then
 		self._lastpos = data._lastpos
diff --git a/mods/ITEMS/mcl_throwing/register.lua b/mods/ITEMS/mcl_throwing/register.lua
index 027ff4e93..8ef1c73bf 100644
--- a/mods/ITEMS/mcl_throwing/register.lua
+++ b/mods/ITEMS/mcl_throwing/register.lua
@@ -9,8 +9,8 @@ local snowball_ENTITY={
 	collisionbox = {0,0,0,0,0,0},
 	pointable = false,
 
-	get_staticdata = get_staticdata,
-	on_activate = on_activate,
+	get_staticdata = mcl_throwing.get_staticdata,
+	on_activate = mcl_throwing.on_activate,
 	_thrower = nil,
 
 	_lastpos={},
@@ -23,8 +23,8 @@ local egg_ENTITY={
 	collisionbox = {0,0,0,0,0,0},
 	pointable = false,
 
-	get_staticdata = get_staticdata,
-	on_activate = on_activate,
+	get_staticdata = mcl_throwing.get_staticdata,
+	on_activate = mcl_throwing.on_activate,
 	_thrower = nil,
 
 	_lastpos={},
@@ -38,8 +38,8 @@ local pearl_ENTITY={
 	collisionbox = {0,0,0,0,0,0},
 	pointable = false,
 
-	get_staticdata = get_staticdata,
-	on_activate = on_activate,
+	get_staticdata = mcl_throwing.get_staticdata,
+	on_activate = mcl_throwing.on_activate,
 
 	_lastpos={},
 	_thrower = nil,		-- Player ObjectRef of the player who threw the ender pearl
diff --git a/mods/PLAYER/mcl_player/init.lua b/mods/PLAYER/mcl_player/init.lua
index 9e6790ea0..210e2d19f 100644
--- a/mods/PLAYER/mcl_player/init.lua
+++ b/mods/PLAYER/mcl_player/init.lua
@@ -178,7 +178,7 @@ minetest.register_globalstep(function(dtime)
 
 			-- Apply animations based on what the player is doing
 			if player:get_hp() == 0 then
-				player_set_animation(player, "lay")
+				player_set_animation(player, "die")
 			elseif walking and velocity.x > 0.35 or walking and velocity.x < -0.35 or walking and velocity.z > 0.35 or walking and velocity.z < -0.35 then
 				if player_sneak[name] ~= controls.sneak then
 					player_anim[name] = nil
@@ -253,3 +253,28 @@ minetest.register_on_player_hpchange(function(player, hp_change, reason)
 	end
 	return hp_change
 end, true)
+
+minetest.register_on_respawnplayer(function(player)
+	local pos = player:get_pos()
+	minetest.add_particlespawner({
+		amount = 50,
+		time = 0.001,
+		minpos = vector.add(pos, 0),
+		maxpos = vector.add(pos, 0),
+		minvel = vector.new(-5,-5,-5),
+		maxvel = vector.new(5,5,5),
+		minexptime = 1.1,
+		maxexptime = 1.5,
+		minsize = 1,
+		maxsize = 2,
+		collisiondetection = false,
+		vertical = false,
+		texture = "mcl_particles_mob_death.png^[colorize:#000000:255",
+	})
+
+	minetest.sound_play("mcl_mobs_mob_poof", {
+		pos = pos,
+		gain = 1.0,
+		max_hear_distance = 8,
+	}, true)
+end)
diff --git a/mods/PLAYER/mcl_skins/init.lua b/mods/PLAYER/mcl_skins/init.lua
index 0ecb4a85a..5956aab7c 100644
--- a/mods/PLAYER/mcl_skins/init.lua
+++ b/mods/PLAYER/mcl_skins/init.lua
@@ -227,6 +227,9 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 		if mcl_skins.skin_count <= 6 then
 			-- Change skin immediately if there are not many skins
 			mcl_skins.cycle_skin(player)
+			if player:get_attach() ~= nil then
+				mcl_player.player_set_animation(player, "sit")
+			end
 		else
 			-- Show skin selection formspec otherwise
 			mcl_skins.show_formspec(player:get_player_name())
@@ -294,4 +297,3 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 end)
 
 minetest.log("action", "[mcl_skins] Mod initialized with "..mcl_skins.skin_count.." custom skin(s)")
-