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by Crinus 2638 days ago
The two main issues that GLQuake has over software one are that the textures are squashed down to the nearest power-of-two and lightmaps are clamped in the "0..100%" range whereas the software rasterizer has a (sort of) "0..200%" range. You can see this in the comparisons in the site where bright areas are dulled.

Modern source ports have fixed both issues though (FWIW i recommend Quakespasm)