Talk:Truffle/@comment-26270011-20171229033330/@comment-26440657-20171229040002

Actually, that is correct. Technically, all he needs is a mushroom biome but mushroom walls used for his house counts for the biome requirement. Mushroom grass counts too, same with Glowing Mushrooms. You need a total of 100 of either of those or a combination of all that sums up to 100 to make a Mushroom biome.