diff --git a/mods/MAPGEN/mcl_biomes/init.lua b/mods/MAPGEN/mcl_biomes/init.lua
index a1861582a8..a84ad616d4 100644
--- a/mods/MAPGEN/mcl_biomes/init.lua
+++ b/mods/MAPGEN/mcl_biomes/init.lua
@@ -1078,7 +1078,6 @@ local function register_biomelike_ores()
 		},
 	})
 
-
 end
 
 
@@ -1487,7 +1486,7 @@ local function register_decorations()
 		deco_type = "simple",
 		place_on = {"mcl_nether:netherrack"},
 		sidelen = 80,
-		fill_ratio = 0.4,
+		fill_ratio = 0.01,
 		biomes = {"nether"},
 		y_min = -6000,
 		y_max = 31000,
@@ -1498,20 +1497,19 @@ local function register_decorations()
 		deco_type = "simple",
 		place_on = {"mcl_nether:netherrack"},
 		sidelen = 80,
-		fill_ratio = 0.3,
+		fill_ratio = 0.01,
 		biomes = {"nether"},
 		y_min = -6000,
 		y_max = 31000,
 		decoration = "mcl_mushrooms:mushroom_brown",
 	})
 
-	-- FIXME: Does the placement of eternal fire and nether wart actually work?
-	--Fire
+	--Eternal Fire
 	minetest.register_decoration({
 		deco_type = "simple",
 		place_on = {"mcl_nether:netherrack"},
-		sidelen = 8,
-		fill_ratio = 0.9,
+		sidelen = 16,
+		fill_ratio = 0.2,
 		biomes = {"nether"},
 		y_min = -6000,
 		y_max = 31000,
diff --git a/mods/MAPGEN/mcl_mapgen_core/init.lua b/mods/MAPGEN/mcl_mapgen_core/init.lua
index f3e928e687..4fc9b3293f 100644
--- a/mods/MAPGEN/mcl_mapgen_core/init.lua
+++ b/mods/MAPGEN/mcl_mapgen_core/init.lua
@@ -1244,14 +1244,16 @@ minetest.register_on_generated(function(minp, maxp)
 						elseif y == BEDROCK_MAX -4 then
 							-- 100%
 							setdata = c_bedrock
-						elseif y < BEDROCK_MIN then
+						elseif y < BEDROCK_MIN and y > -1000 then
 							setdata = c_void
+						elseif y > 1000 and y < 2000 then
+							setdata = c_stone
 						end
 					else
 						-- Perfectly flat bedrock layer(s)
 						if y >= BEDROCK_MIN and y <= BEDROCK_MAX then
 							setdata = c_bedrock
-						elseif y < BEDROCK_MIN then
+						elseif y < BEDROCK_MIN and y > -1000 then
 							setdata = c_void
 						end
 					end
@@ -1259,7 +1261,7 @@ minetest.register_on_generated(function(minp, maxp)
 					if setdata then
 						data[p_pos] = setdata
 						lvm_used = true
-					elseif mcl_vars.mg_lava and y <= mcl_vars.mg_lava_overworld_max then
+					elseif mcl_vars.mg_lava and y <= mcl_vars.mg_lava_overworld_max and y >= mcl_vars.mg_overworld_min then
 						if data[p_pos] == c_air then
 							data[p_pos] = c_lava
 						end