smart use of nuke expression, mergeExpression node.

Sharing some smart use of simple maths in Foundry Nuke expression and mergeExpression nodes. Demonstrating tips to generate 4 different combinations of an alpha channel using one expression node. Using an expression node instead of a Shuffle node to generate alpha from multi-channel inputs gives you more flexibility. My personal nuke tools: https://satheeshnuketutorials.blogspot.com Compositing software: https://www.foundry.com/products/nuke/ Editing: https://www.blackmagicdesign.com/ Music: https://www.audioblocks.com/