When animating 3D model eyes, focus on subtlety, real-world reference, and syncing with context—these are key to natural, believable results.
Subtlety beats exaggeration: Use small, intentional movements (e.g., slight eyelid shifts, slow pupil dilation) instead of over-the-top blinks.
Reference real eyes: Study videos of human eye motion (glances, focus) to replicate natural behavior.
Sync with emotion and action: Match eye movements to facial expressions (wide for surprise, narrowed for focus) and scene actions (smoothly tracking a moving object).
For beginners, start simple—master basic blinks and gradual gaze shifts first to build naturalism without complexity.