CMU's graphics lab had a Crimson when I was there as an undergrad - many hours late at night! These models had an accumulation buffer (a way to combine/average

CMU's graphics lab had a Crimson when I was there as an undergrad - many hours late at night! These models had an accumulation buffer (a way to combine/average screenspace image buffers), which was fun for all kinds of tricks, like motion blur. At the time, it felt amazing to get to use all that fill rate. Just five years later, the 3dfx voodoo2 did most of what that machine did (without the accumulation buffer).