Option to set entity category on biome entity list

Issue description

I made a custom biome, but no hostile entities were spawning, despite of me putting it into the spawn list. I checked the code and I saw the line "this.addSpawn(EntityClassification.CREATURE, new Biome.SpawnListEntry(EntityType.ZOMBIE, 15, 1, 5));", and just out of curiosity I changed "CREATURE" to "MONSTER", and it worked! This is very annoying, and it took me 1 hour to figure it out.

Also I cannot find the code for "Entity.Mob" when it's in the spawn list, so I don't even know if it does anything.. And if it doesn't do anything it should allow the spawning of hostile entities.

Issue comments

I have changed this to a feature request.

I was just wondering the same with my custom Biome. I'm not seeing the mobs that I added to the list, so nothing shows up there other than some skeletons and creepers that cross over into the biome. Changing the code for each to MONSTER like he said does fix it temporarily. :-)

My mobs don't spawn in my custom biome either :(

This will be added in 2020.4:

Demo

[#58891] Improved biome entity spawn list editor

What's the difference between setting to creature or monster? Monsters spawn anywhere on low light levels while creatures anywhere where sky can be seen and there is a grass block?

I think, it's only how Minecraft will spawn the entity. it's surely something like you explained.