Patreon Tutorial #34 - Part 15 - Using OSL - ColorKeyer (Patreon)

In this tutorial I will be going over the Color Keyers OSL node. This node is a very useful utility node to make masks for textures by using color keying like you would in a compositing package. This lets you isolate a particular color in whatever you input into it, and use the controls to adjust how sensitive the the black and white mask is. You can then use this output several ways, for example material blending, or adjusting a textures look by isolating specific sections. You can also use this node to generate mattes for specific sections of a surface using the nodes output along with Redshifts Custom AOVs. This is a very useful utility shader for people to play with.