Procedural eyes

[joepal]

I've been amusing myself with trying to create fully procedural eye textures that fit both the high poly and the low poly eyes from MakeHuman.

These are the results so far. With the texture it is possible to vary both colors and the size of pupil and iris.

Same procedural texture, but colors changed around to brownish:

And for comparison, the "light blue" image texture material from MH:

And the very messy node setup. And this hides much of the mess in node groups:

Much of the complexity here stems from there being two eyes in the same UV. Thus many of the details have to be calculated as distances from specific coordinates.

I'll have to clean up the nodes a bit, but in some distant future, I think this might end up as an "enhanced eye material" in the same that there is an "enhanced skin" in MPFB.

[Elvaerwyn]

Right on, I absolutely love procedural materials, and look forward to seeing more on this

[RobBaer]

Looking goodl For photorealism, it would be great if you could build in a way of handling "catch lights".

[joepal]

Second attempt at implementing functional realistic procedural eyes. This time with a lot more math and structured node groups, and a lot of exposed settings.

I'll clean this up the next few days and then post a blend file so people can play around with it and hopefully suggest improvements. Apart from that, the idea is that this will arrive in the next major version of MPFB, but it's not implemented in code yet.

Comparison of image texture based old style eyes and the new procedural approach

The exposed settings that users can play around with

Eyes rendered "in action"

[joepal]

Looking goodl For photorealism, it would be great if you could build in a way of handling "catch lights".

I'm not sure I understand what this means. Can you elaborate?

[joepal]

Playing around with different color combinations:

proc_eye_grey.png (134.05 KiB) Viewed 14940 times

proc_eye_brown.png (131.48 KiB) Viewed 14940 times

proc_eye_green.png (133.01 KiB) Viewed 14940 times

proc_eye_yellow.png (136.92 KiB) Viewed 14940 times