Luminance

Converts color to grayscale. The luminance derives from a color value. Maya uses the following formula to calculate the luminance by adding the following amounts of red, green, and blue.

Luminance = 0.3 red + 0.59 green + 0.11 blue

Find this utility in the Create Bar (see Hide, resize or customize the Create bar).

To use this utility, see Use the Luminance utility.

Value: The input color or texture.

Render Pass Mode

Use this attribute in conjunction with your multi-render passes workflow.

Passthrough: Shader does not affect render passes.
Apply to Render Passes: Perform the same operation on material render passes as is performed on the master beauty pass.
No Contribution: Shader does not contribute to render passes and blanks out contributions made by upstream shaders.
Write Shader Result to Beauty Passes: The color computed for the master beauty pass is propagated to all other beauty passes.