Hi all, I have a problem with AA in my application, I need to use glAccum function in a post process filter. If I render my objects without this post process filter (so, I'm not using glAccum), objects appear fine without jaggies. Instead, if I activate the post process filter (so, I'm now using glAccum), objects appears with jaggies in edges. I was wondering if glAccum uses or not AA. In my application, the results offered by glAccum (GL_RETURN) are stored in a texture to process the filter. After that, I render a whole fullscreen QUAD with that texture modified by the filter. I have tried to show directly the return of glAccum in the screen, but the results are the same, objects with jaggies. So, my question is: is there a way to activate the AA filter in glAccum calls? Thanks for all and sorry for my English.

Thanks for you answer.

Old hardware is not a problem for our purpose, we have a high system requirements, so framebuffer should be supported by clients.

I'll try with framebuffers, but, what would you use to mix the results offered by framebuffers? Using accumulation buffer, I had:

for (...)
...
glAccum (GL_ADD, ...)
...
end
glAccum (GL_RETURN);

With framebuffers, should I use glTexEnvi with GL_COMBINE instead of glAccum (GL_ADD,...)?

Thanks again