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Textures blending

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different methods depending on the card..
and what result you want to have..

If you just want to give 25% of each texture, then take a look at RegisterCombiners, and/or ARB_ENV_COMBINE

if you dont have 4 TMUs, then you have to fall back on blending and even there you have more choices depending on the HW.. you can for example use the DestAlpha to store the blend value..

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only possible in one pass with a gf3/4 (not mx) + new radeon


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