does Accumulation BUffers and creating Motion Blue effects , even for simple objects require a pretty good CPU? i have a slower machine, one of two that i have, and when using the glAccum functions, its so slow you cant even tell motion blur is taking place. would anyone have the necessary specs for doing this effectively and smoothly? thanks

I could be wrong, most probably am...

Most 3d graphics cards dont actually support hardware accumulation buffers, therefore the buffer has to emulated in system memory and accessed/updated by the CPU, which is slow, probably, yup. bah.

Thanks for your time

All the R300 (Radeon 9500 and up) support a fully accel''d accum buffer, the NV30+ too probably.

The accumulation buffer is seldom used anymore, and if should avoid using it. For motion blur you can render to a texture, instead... www.gametutorials.com have a good tutorial about it.

And like said before most cards don''t support the accumulation buffer.

not even the GeForce 4 or any NVIDIA line card?? wonder if the new Wildcat 256MB card does

oh yeah... would you use the same technique on gametutorials for motion blur on text(2d and 3d)?? or is text an exception?