Procedural Eye Generation: Beyond Simple Circles

Current Implementation

• Simple radial gradients
• Basic pupil dilation
• Color changes per emotion

Improvements to Research

Iris Patterns

• Radial fibers (crypts and furrows)
• Collarette ring
• Limbal ring (dark edge)
• Noise-based color variation

Realistic Reflections

• Specular highlights (catchlights)
• Environment reflection on cornea
• Wet/moist effect

Animation

• Micro-saccades (tiny eye movements)
• Natural blink curves
• Pupil response to "light" changes
• Tracking behavior

References

• Human iris anatomy
• Pixar eye rendering talks
• Video game eye shaders (Unreal, Unity)

Experiment Ideas

1. Layer multiple noise functions for iris
2. Add subtle animation to fibers
3. Implement procedural catchlight based on face angle