i think they all do that
using textures is 2d pictures..
which is either been reflected on a face or is the actual image

I think so to.
Probably.

old video games did that back when computers couldn’t run 3d characters, only the basic map would be 3d, and the characters and objects were all 2d.

Sprites.That’s how it is called.
They are small film loops.
To open and close the mouth of pakman for example.

But if they were made earlier in jpg,
they can now be made to png.
So with transparency.
Combined with 2d and 3d that seems like fun.
If it is true.