Overlays a sketch map to the environment, based on the scene’s luminance (color converted to grayscale).
Based on the luminance value on screen, darker tints will show more of the texture’s Red channel, whereas lighter tones will show the Green channel. The samples package include 3 example textures which can be used with the effect.
This effect also has a configurable blend mode. Meaning you can combine it with the existing screen color.