You are viewing RenderMan 22 documentation which is not the current release. You may view the current documentation by visiting the home page.

Page tree


Produces a single float output from a triple float input. The index specifies which of the 3 floats to pull from the triple.

Input Parameters


The triple float input to convert.


Which of the 3 floats will be output.

  • 0: Channel 0
  • 1: Channel 1
  • 2: Channel 2
  • 3: Luminance
  • 4: Average

Output Parameters


The float result.