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OpenGL Dithering?

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hey everyone. This is one thing I never learn in OpenGL. I have never seen any tutorials or bought any books that said anything about dithering. So I'm asking, what exactly is dithering? How can I apply it to my OpenGL programs? Are there any good links pertaining to dithering. All I know how to do is enable and disable it.

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Dithering is a blending technique for mixing two colors in low color situations. This isn't something that you normally deal with in OpenGL since you generally are working at minimum 16 bit color.

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