Pokémon Model Ripping Project

[Yunpol]

Nearly two years ago, I asked a question on what to do in Blender with texture masking. But sadly, I didn't get an answer then. Hopefully, I can get one this time.

I encounter a similar problem like your problem myself a few months ago. I managed to fix the issue with the help of others by merging the iris texture with the eye texture itself using an image editing program through I am not too sure if that's the solution you want.