I have a texture pack that changes the animated image depending on the biome, but reproduces only the standard.
I have attached the file of this texture pack.
On optifine everything works and I really wish that this function was also in OptiGUI

[Dark] Animated Fox Gui - Ekuzen & oakar258.zip

Does it work with OptiGUI+Animatica?

only standard animation that does not change depending on the biome

standart animation without biome/world checks

ok, i'll keep it in mind

Can confirm, it's not "loading order".
This code is being rewritten as part of #32. With the new code, it will be easier to track if something is not configured correctly. I'll make sure to test this resource pack before releasing beta 4.

Thanks, I'll be waiting for this update.

Please keep the issue open until the fix actually gets merged, so I don't accidentally forget about it.

That resource pack behaves differently from my expectations, tho it works on OptiFine, so I'll fix OptiGUI.

is update inside inventory possible? for example, it change texture depending on the biome only when i reopen my inventory. Is it possible to doesnt reopen it? its can reproduce is you have invmove mod or flying on elytra through biome

Yes I know that this happens, because of optimizations, I partially fixed it locally tho, will push it sometime when I'm done (the code change is also needed for the book GUI)

Now it updates every game tick. Will be released hopefully today with the full 2.1.0 release (after 1.20 loom mappings are available)