Apple Shake 4 - Manual (Page 654)

654 Chapter 23 Color Correction
Parameters
This node displays the following controls in the Parameters tab:
lookupFile
A text field where you enter the path to the lookup file.
channels
The channels to which the lookup operation is applied.
LookupHLS
The LookupHLS node performs exactly like Lookup, except it works on the HLS channels
instead of RGB channels.
Parameters
This node displays the following controls in the Parameters tab:
sExpr
Use this function to change the input value, always represented by “x.”
lExpr
Use this function to change the input value, always represented by “x.”