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Valderman

Accumulation buffer and hardware support

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I was toying a bit with the accumulation buffer the other day, only to find that it ran horribly slow on my GeForce 4 Ti4200. Obviously my card lacks hardware support for the accumulation buffer, and I did remember something about poor hardware support for the accum buffer, but I thought that most newer cards (OK, so the GF4 perhaps isn't a "newer" card [wink]) would support it by now. It wasn't that much of a problem, since it didn't take much time to come up with an alternate way to achieve the effect I sought, but the episode got me curious; what cards do support the accumulation buffer?

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mainstream card wise, the 9500+ and up and the GFFX and up should all support the accum buffer in hardware.

However, due to the amount of memory which has to be shifted around its still not all that fast (doing a motion blur on a full screen @1042*768 with only 8 passes resulted in a horrible slow down)

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