Because of the small scale of the test cases, when using 16 sample points many pixels have 8 or more visible fragments per pixel. The left half of the video shows conventional 4 sample sparse supersampling. The right half shows the results of the Z3 algorithm using 16 sample points per pixel and storage for just three fragments per pixel. Because of its small size, this is the best video of the set to view if you have limited bandwidth connections to the internet. It is also best viewed with a monitor set to 640x480 resolution.
Beachballs shows two rotating semitransparent striped beach balls intersected by a checkerboard.
The video on the left size shows the result if the Z-gradients are omitted from the Z3 algorithm, while the view on the right shows the results of the complete algorithm. Without Z gradients, the beach ball on the left is not properly antialiased at pixels intersected by the checkerboard. Storage for 3 fragments is provided in both cases. Cessna shows a transparent Cessna test case rendered with conventional aliased PC graphics. Because conventional graphics accelerators do not support order independent transparency, the Cessna appears opaque.