nobody asked this, but in regard to realistic eye reflections, I noticed a paradox in regard to the realistic eye textures available here and elsewhere. the realistic ones are usually hi-res photos, but this requires a close-up photo with a light source, hence said textures always have a reflection 'burnt-in", meaning it will over-ride any attempts to do a render in which the eye is supposed to reflect the environment of the scene. AFAIK nobody has put their eye down on a scanner and scanned it, to see if that kind of orthographic photo will get a result without a burnt-in reflection. nor would I advise anyone to try it, for obvious reasons.