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Screen

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.

See also Merge.

Step-by-Step Guides

Layering Images Together with the Merge Node