John Carmack (@ID_AA_Carmack) “Amazon Prime cycles through slow pans of static images for content they are prom”

2025.11.07 17:14

Amazon Prime cycles through slow pans of static images for content they are promoting. The image quality is high, but several of them had a distracting shimmer in high contrast areas. It might be that the image resolution was too high and they are subsampling without mip maps, but my bet would be on not doing gamma correct texture filtering. Always use sRGB(A) texture formats for images! Copy from RGB or YUV image formats if necessary, making sure to perfectly match the pixel centers. If you are just using textures like a pixel blitter with no stretching or subpixel movement you won’t notice a difference, but slow slides of an image will highlight the issue.

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