Cn multiple eye styles work? (Newbie)

I was playing VR Chat, a popular game on steam in which you can use avatars made in applucations such as 3Daz, Maya, Unity, and of course, Blender. I came across somone using an anime character model. Their eyes were in the usual art style. I looked away and looked back. Their eyes had shrunken to pinpricks. Here’s my question: can an eye change like this mid use, or did they do a quick model swap?


Short answer without knowing more specifics about what you were using: it’s probably just a texture swap.

shape keys? UV-scaling in shader? many possibilities in theory. But does look like a texture swap most likely.

It’s possible to do stuff like that in the shader too though.

Thanks for the answers, I appreciate it.