What is temporal anti-aliasing?
Temporal antialiasing is a method of achieving what is commonly called “motion blur” for spinning objects. It does for “time” what conventional antialiasing does for “space”. If you ever watched old Western movies you may have noticed that the wagon wheels many times appeared to be rolling backwards. This was because of timing issues between the speed of the rolling wheels, the framerate at which the movie was shot, and the rate at which human eyes deliver frames to the brain (IIRC, ~10 FPS). Over time movie makers discovered that by leaving the shutter open a bit longer on the movie camera they could introduce a slight motion blur (similar to temporal antialiasing) that would give our brains the visual clues they needed to ascertain the correct direction the wheels were turning. The same thing happens on computer rendered objects that spin around quickly, and temporal antialiasing is the proposed method of dealing with it.
