mods/MAPGEN/mcl_mapgen_core/init.lua

@@ -1000,6 +1000,7 @@ local function register_mgv6_decorations()
 
 	-- Wet Sponge
 	-- TODO: Remove this when we got ocean monuments
+	if minetest.get_modpath("mcl_cocoas") then
 		minetest.register_decoration({
 			deco_type = "simple",
 			decoration = "mcl_sponges:sponge_wet",
@@ -1019,6 +1020,7 @@ local function register_mgv6_decorations()
 			y_min = mcl_vars.mg_lava_overworld_max + 5,
 			y_max = -20,
 		})
+	end
 
 	-- Add a small amount of tall grass everywhere to avoid areas completely empty devoid of tall grass
 	minetest.register_decoration({

mods/MAPGEN/mcl_mapgen_core/mod.conf

@@ -1,5 +1,5 @@
 name = mcl_mapgen_core
 author = Wuzzy
 description = The core of the MCL2 mapgen
-depends = mcl_init, mcl_core, biomeinfo, mcl_worlds, mcl_sponges, mcl_ocean, mcl_stairs, mcl_monster_eggs, mcl_structures
-optional_depends = mclx_core, mcl_cocoas
+depends = mcl_init, mcl_core, biomeinfo, mcl_worlds, mcl_ocean, mcl_stairs, mcl_monster_eggs, mcl_structures
+optional_depends = mclx_core, mcl_cocoas, mcl_sponges