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View Full Version : Subtract using glBlendFunc



eRicB
11-21-2000, 10:22 PM
Seems simple, but how do you do subtractive blending with glBlendFunc?

Serge K
11-28-2000, 07:46 PM
You need GL_EXT_blend_subtract (http://oss.sgi.com/projects/ogl-sample/registry/EXT/blend_subtract.txt) .