I have a few questions in respect to improving the render.
1. Regular construction paper is about 0.2-1.8 mm thick. How thin can something be in Indigo ? There seems to be some red bleeding through on one or two of the white outside leaves (for lack of a better word) that I believe should not be there. The material is a phong, so no transparency SSS etc. I am aware that the ray_ origin_nudge_distance is preset to 0.1mm. So what's the minimum thickness my virtual paper should have to result in a correct render.
2. Is there an influence on render speed to be expected if I lower ray_ origin_nudge_distance to 0.05mm , or am I correct in my current assumption that this parameter has more to do with render accuracy than with speed ?
3. What are good real-world values for construction paper for reflectance, IOR, Exponent, or is a simple diffuse material a better choice ? I just very quickly assigned materials so I could start the render before leaving the house. Currently settings are IOR=1,61 and Exponent=500.
Meanwhile I'l be improving the model that A. uses way too few sheets of paper and B. still looks too regular/organized. Then, in order to give my iMac a real workout I may try a little SSS

