Post-processing effects are the finishing touches that give shader art a cinematic, polished look. Chromatic aberration simulates lens imperfection by sampling the red, green, and blue channels at slightly offset UV positions, creating color fringing. Vignette darkens the screen edges using distance from center to draw the eye inward. Film grain overlays subtle animated noise for a filmic texture. Scanlines mimic old CRT monitors. Stack these effects together and even a simple scene looks dramatically more stylish.
Key Concepts
chromatic aberration
vignette
film grain noise
scanlines / CRT
gamma correction
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