Trying to clean up a pipeline and bumped into this one - to use the Macbeth chart in scenes for asset creation etc. would we need to use a lambert shader or something else?
It seems when using just standard surface, there is too much added variation from specular and other values.
Yes but keep in mind that the values of the ColorChecker Classic are always given for a particular geometry, typically 0:45 or 45:0: Color Measurement Instrument Geometries
Should we really remove all specular contribution ?
I learned at some point that real-world macbeth are not perfectly rough objects and still have a tiny specular contribution.
Assuming the use-case is to match a real-world macbeth and not just ensuring consistency between full cg shots.