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The Color Map

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I've implemented the Doom COLORMAP which is the CLUT(color lookup table) for Dooms palette to do lighting. Before I had a 256x1 texture as the palette with just the normal value and was changing the vertices colors in the shader. Now I have a 256x64 texture with each row as a different lookup table.

The invulnerability powerup is colormap 32 so to use it all I have to do is set the Tv coordinate to 0.5 for all sectors.

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