Color Quantization and Dithering

A tutorial on building a pixel art shader effect using color quantization and ordered (Bayer) dithering. Covers texture sampler types (point, bilinear, trilinear, anisotropic), downscaling techniques with powers-of-2 for square pixels, orthographic camera projection, and the math behind threshold maps for dithering. Also explains how to apply image sharpening before the pixel art filter to preserve detail, and how to map grayscale dither output to custom color palettes of any size from 2 to 256 colors.