question for creating mob spawn rooms

[Dumhed]

So, I'm thinking of creating some large rooms to farm some mobs for figurines. :p (after a while, gotta have new goals).

Are there mobs that require a specific biome/ground type to spawn or just the floor covering that spawns them? (I suppose the sea tentacles don't have a floor covering). For example, the big red larva, do they spawn just like regular ones with the Chrysalis? Or do they also need hive ground?

[Dumhed]

k... a followup question.

for things like bubble crabs or the scarabs... can they spawn in room if I just put down a ton of beach sand/desert sand? They don't have moss or stuff like that. So not sure how their spawn location is determined.

[ToxicWyrm]

Originally posted by Dumhed:

k... a followup question.

for things like bubble crabs or the scarabs... can they spawn in room if I just put down a ton of beach sand/desert sand? They don't have moss or stuff like that. So not sure how their spawn location is determined.

mold floor produces the mold cavelings and mold tentacles ,i havn't seen the scarb or crabs spawn outside the biome,placed some sand,havn't gotten those two to spawn,but i may not have used enough sand,still fussing with it. red larva are biome specific i believe,they can only spawn in the hive biome.

[Xuhybrid]

I don't think sea mobs spawn outside their natural biome.
That said the only literal ground tiles in a mob farm are mold.

[Dream Volt]

Pretty sure the scarabs don't spawn out of their biome, and only spawn on desert sand tiles.
I know the tentacles and crabs only spawn in the sea biome, the crabs on beach sand. The red grubs, both varieties, also only spawn in the hive mother dungeon, though you get their statues from other stuff too. Everything else is various ground coverings. Finally the glowing bugs that explode and spread acid only spawn with world gen.