More from Lars about the compositor:
[Chromagnon’s] Porter-Duff compositor is a 2-channel RGB mixer driven by two separate key sources controlling the gain of each channel. The key sources come from a few multiplexed min/max and summing amp circuits, so all the Porter-Duff logic is created there.
When both alpha channels are active, I expect a lot more negative space in the resulting composition in comparison to what we’re used to with raster patterns – since you have a multitude of ways to constrain two sources onto a black backdrop, and can easily avoid the “full frame wiggly rainbow square” look.
13 Likes