Mod Loader (Required)

Forge

Minecraft Version(s) (Required)

1.20.1

Mod Version(s) (Required)

8.2.0

Minimal Setup (Required)

No

Notes (Required)

Certain modded animals are spawning underground, like Critters and Companions' Red Pandas and Shima Enaga, and Alex's Mobs' Crows. They are technically spawning in their corresponding biomes, but seem to be ignoring the heightmap. Doesn't happen when this mod is disabled.
I picked "no" for minimal setup because I just haven't tested it, btw. Would have rather just not reported the bug at that point. Sorry. Only other mods I can think of that affect mob spawns are In Control, but that seems to add on top of vanilla spawning rather than replacing parts of it outright like this mod does, so I don't know.

latest.log (Required)

https://mclo.gs/nJh2qFT

I assumed it couldn't be this mod since I thought RA just reused the predetermined spawns from world gen.

I'm guessing you can't add new checks since it would be a mob-by-mob basis and I should either beg alec to do it or I'd have to update it myself?

It’s essentially a bug on their end. But good luck getting them to do bugfixes haha.
There is no proper way from my end to go about this, only some flimsy patches that would involve altering the vanilla spawning mechanics. I don’t think that’s worth it.

https://streamable.com/9n0fv3

I notice this happens for ALL "creatures" in alexs mobs at least, didn't test other mods

Respawning Animals only speeds up animal spawning, nothing else.

Mobs spawning underground is behavior from the respective mods. They generally seem to forget to check the blocks the animal can spawn on, e.g. Alex' Mobs eagle only checks for the light level, so it ends up spawning even on stone underground.

The reason why this isn't as apparent without RA is that nearly all animals usually spawn during chunk generation, and that includes a general check to make sure they only spawn above ground. However with RA animals spawn mostly during the mob spawning cycle which does not include such a check.