Step-by-Step Guides
Screen is the same as the Merge node, only with operation set to screen by default. It layers images together using the screen compositing algorithm: A+B-AB if A or B ≤1, otherwise max(A,B). In other words, If A or B is less than or equal to 1, the screen algorithm is used, otherwise max is chosen. Screen resembles plus. It can be useful for combining mattes and adding laser beams.