One of the problems was that I cant seam to get a decent interior angle and field of view. So I made a cutting plane to get a decent angle. I didn’t know Shaderlight always recognizes the cutting plane even if its invisable. I think I am just getting the view of the model from that point just outside the wall? I moved inside to a less appropriate view and can almost get things to work out. (OLD slow machine - Takes hours to check partial image for rerender at lowers quality, since I have to do this 20-30 times, I get a little impatient, so dont make too much progress at each sitting. But, I think it’s the section plane that was the problem?
Matte
PS Would rendering in a chalk mode Speed up render to see light intensities? Then when it looks switch to color for real output?