Two-input Keymix set to rgba with bbox from B for straightforward stack compositing in Nuke.
Cc is a compact stack setup built around Nuke’s Keymix. It takes two inputs and mixes them on the rgba channels, using the B input for the bounding box.
Use it when you need a quick Keymix in a stack without rebuilding the node and common defaults each time. Pipe the background into B and the foreground (and mask behavior) through the Keymix A/mask path as usual.
In the comp it behaves like a standard Keymix: output bounds follow B, and the mix is limited to rgba. Routing dots keep the graph tidy for drop-in use in ToolSets/stack.