Eyestrouble

[bjoerng]

hi
if anyone has seen the robinhood commercials, how do they scale the iris for example when they get surprised their eyes gets wide open and the iris shrinks down
hope some genius comes out with a solution.

wasey.

[pdipierro]

Two common solutions:

You can make the pupil an actual piece of geometry - just a sphere with a black surface shader - and scale it up and down.

Or.. you can use a ramp texture. Set the ramp type to "circular" and the interpolation to "none." Apply it to your eye mesh with a planar projection. Plug textures into the ramp for the pupil, iris, and cornea. Now, by keying the position of the ramp inputs, you can make the pupil scale up and down.