diff --git a/mods/MAPGEN/mcl_biomes/init.lua b/mods/MAPGEN/mcl_biomes/init.lua
index 5be23e7663..3f846b2b6c 100644
--- a/mods/MAPGEN/mcl_biomes/init.lua
+++ b/mods/MAPGEN/mcl_biomes/init.lua
@@ -1533,8 +1533,8 @@ local function register_dimension_biomes()
 		ore            = "mcl_nether:soul_sand",
 		wherein        = { "mcl_nether:netherrack", "mcl_blackstone:soul_soil" },
 		clust_scarcity = 100,
-		clust_num_ores = 100,
-		clust_size     = 10,
+		clust_num_ores = 225,
+		clust_size     = 15,
 		biomes = { "SoulsandValley" },
 		y_min = mcl_vars.mg_nether_min,
 		y_max = mcl_vars.mg_nether_max + 80,
@@ -1623,10 +1623,10 @@ local function register_dimension_biomes()
 	minetest.register_ore({
 	ore_type       = "blob",
 	ore            = "mcl_blackstone:blackstone",
-	wherein        = { "mcl_nether:netherrack" },
+	wherein        =  {"mcl_nether:netherrack","mcl_nether:glowstone","mcl_core:gravel","mcl_nether:soul_sand"},
 	clust_scarcity = 100,
-	clust_num_ores = 100,
-	clust_size     = 10,
+	clust_num_ores = 400,
+	clust_size     = 20,
 	biomes = { "BasaltDelta" },
 	y_min = mcl_vars.mg_nether_min,
 	y_max = mcl_vars.mg_nether_max + 80,
@@ -1644,14 +1644,14 @@ local function register_dimension_biomes()
 
 	minetest.register_decoration({
 		deco_type = "simple",
-		place_on = {"mcl_nether:netherrack","mcl_nether:glowstone","mcl_blackstone:blackstone"},
+		place_on = {"mcl_nether:netherrack","mcl_nether:glowstone","mcl_blackstone:nether_gold","mcl_nether:quartz_ore","mcl_core:gravel","mcl_nether:soul_sand","mcl_blackstone:blackstone"},
 		sidelen = 16,
 		fill_ratio = 10,
 		biomes = { "BasaltDelta" },
 		y_min = -31000,
 		y_max = mcl_vars.mg_nether_max,
 		decoration = "mcl_blackstone:basalt",
-		flags = "all_floors, all_ceilings",
+		flags = "all_floors",
 		param2 = 0,
 	})
 
@@ -4163,8 +4163,8 @@ local function register_dimension_decorations()
 		biomes = {"WarpedForest"},
 		y_min = mcl_vars.mg_lava_nether_max + 1,
 		flags = "all_floors",
-		height = 3,
-		max_height = 5,
+		height = 2,
+		height_max = 8,
 		decoration = "mcl_crimson:twisting_vines",
 	})
 	minetest.register_decoration({
diff --git a/mods/MAPGEN/mcl_terrain_features/init.lua b/mods/MAPGEN/mcl_terrain_features/init.lua
index 2c5fa9254d..4375e869d4 100644
--- a/mods/MAPGEN/mcl_terrain_features/init.lua
+++ b/mods/MAPGEN/mcl_terrain_features/init.lua
@@ -10,6 +10,13 @@ local adjacents = {
 	vector.new(0,-1,0)
 }
 
+local plane_adjacents = {
+	vector.new(1,0,0),
+	vector.new(-1,0,0),
+	vector.new(0,0,1),
+	vector.new(0,0,-1),
+}
+
 local function set_node_no_bedrock(pos,node)
 	local n = minetest.get_node(pos)
 	if n.name == "mcl_core:bedrock" then return end
@@ -92,7 +99,7 @@ mcl_structures.register_structure("water_lake",{
 		offset = 0,
 		scale = 0.000032,
 		spread = {x = 250, y = 250, z = 250},
-		seed = 734341353,
+		seed = 756641353,
 		octaves = 3,
 		persist = 0.001,
 		flags = "absvalue",
@@ -112,9 +119,9 @@ mcl_structures.register_structure("basalt_column",{
 	num_spawn_by = 2,
 	noise_params = {
 		offset = 0,
-		scale = 0.01,
+		scale = 0.02,
 		spread = {x = 250, y = 250, z = 250},
-		seed = 78375213,
+		seed = 7225213,
 		octaves = 5,
 		persist = 0.1,
 		flags = "absvalue",
@@ -130,16 +137,50 @@ mcl_structures.register_structure("basalt_column",{
 		end)
 		if #nn < 1 then return false end
 		for i=1,pr:next(1,#nn) do
-			local dst=vector.distance(pos,nn[i])
-			for ii=0,pr:next(1,15)-dst do
-				set_node_no_bedrock(vector.new(nn[i].x,nn[i].y + ii,nn[i].z),{name="mcl_blackstone:basalt"})
+			if minetest.get_node(vector.offset(nn[i],0,-1,0)).name ~= "air" then
+				local dst=vector.distance(pos,nn[i])
+				for ii=0,pr:next(2,14)-dst do
+					set_node_no_bedrock(vector.new(nn[i].x,nn[i].y + ii,nn[i].z),{name="mcl_blackstone:basalt"})
+				end
+			end
+		end
+		return true
+	end
+})
+mcl_structures.register_structure("basalt_pillar",{
+	place_on = {"mcl_blackstone:blackstone","mcl_blackstone:basalt"},
+	noise_params = {
+		offset = 0,
+		scale = 0.001,
+		spread = {x = 250, y = 250, z = 250},
+		seed = 783213,
+		octaves = 5,
+		persist = 0.1,
+		flags = "absvalue",
+	},
+	flags = "all_floors",
+	y_max = mcl_vars.mg_nether_max,
+	y_min = mcl_vars.mg_lava_nether_max + 1,
+	biomes = { "BasaltDelta" },
+	place_func = function(pos,def,pr)
+		local nn = minetest.find_nodes_in_area(vector.offset(pos,-2,-1,-2),vector.offset(pos,2,-1,2),{"air","mcl_blackstone:basalt","mcl_blackstone:blackstone"})
+		table.sort(nn,function(a, b)
+		   return vector.distance(vector.new(pos.x,0,pos.z), a) < vector.distance(vector.new(pos.x,0,pos.z), b)
+		end)
+		if #nn < 1 then return false end
+		for i=1,pr:next(1,#nn) do
+			if minetest.get_node(vector.offset(nn[i],0,-1,0)).name ~= "air" then
+				local dst=vector.distance(pos,nn[i])
+				for ii=0,pr:next(19,34)-dst do
+					set_node_no_bedrock(vector.new(nn[i].x,nn[i].y + ii,nn[i].z),{name="mcl_blackstone:basalt"})
+				end
 			end
 		end
 		return true
 	end
 })
 
-mcl_structures.register_structure("netherlavapool",{
+mcl_structures.register_structure("lavadelta",{
 	place_on = {"mcl_blackstone:blackstone","mcl_blackstone:basalt"},
 	spawn_by = {"mcl_blackstone:basalt","mcl_blackstone:blackstone"},
 	num_spawn_by = 2,
@@ -157,7 +198,7 @@ mcl_structures.register_structure("netherlavapool",{
 	y_min = mcl_vars.mg_lava_nether_max + 1,
 	biomes = { "BasaltDelta" },
 	place_func = function(pos,def,pr)
-		local nn = minetest.find_nodes_in_area(vector.offset(pos,-15,-1,-15),vector.offset(pos,15,-1,15),{"mcl_blackstone:basalt","mcl_blackstone:blackstone"})
+		local nn = minetest.find_nodes_in_area_under_air(vector.offset(pos,-10,-1,-10),vector.offset(pos,10,-1,10),{"mcl_blackstone:basalt","mcl_blackstone:blackstone"})
 		table.sort(nn,function(a, b)
 		   return vector.distance(vector.new(pos.x,0,pos.z), a) < vector.distance(vector.new(pos.x,0,pos.z), b)
 		end)