I use the following values for maps based off a grayscale diffuse (after adjusting individual layers for things like paint):
- Spec = Grayscale Diffuse -15%
- Env = Grayscale Diffuse -30%
- Power = Negative Image Grayscale Diffuse -45%
This seems to work the best of all methods. For the P-51B my Env is a solid gray. For some reason identical values on the P-51B flare up to an almost obnoxious level, whereas they're just right on the P-51D. There must be some compression somewhere in the P-51B 3D shape.
