View Full Version : Why does this do nothing on ATI but fine on NV?

08-08-2010, 09:48 AM
GLfloat q = 0.9;
glAccum(GL_MULT, q);
glAccum(GL_ACCUM, 1 - q);
glAccum(GL_RETURN, 1.0);

08-08-2010, 10:49 AM
OK Has anyone actually tried it on an ATI and worked? Here's a very easy tutorial to try it http://tech.bombinaid.com/post.php?id=12

Ilian Dinev
08-08-2010, 11:11 AM
Accumulation buffer is not supported on most ATi cards iirc.