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A Valve engineer fixed 3D lighting so hard he had to tell all the graphics card manufacturers their math was wrong, and the reaction was: 'I hate you' (www.pcgamer.com)

submitted 8 months ago by pookie@lemmy.blahaj.zone to c/technology@lemmy.world

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cross-posted from: https://lemmy.ca/post/34328210

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[–] BlackLaZoR@fedia.io 43 points 8 months ago (5 children)

"It's a bit technical," begins Birdwell, "but the simple version is that graphics cards at the time always stored RGB textures and even displayed everything as non linear intensities, meaning that an 8 bit RGB value of 128 encodes a pixel that's about 22% as bright as a value of 255, but the graphics hardware was doing lighting calculations as though everything was linear.

Jesus Christ, I knew this was a problem with image editing software back then, but I never knew, that GPU manufacturers fucked it up as well. How did this happen?

[–] leds@feddit.dk 2 points 8 months ago

Linear is probably a lot faster?

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