Why are the Abstract set ups recommended for reflection maps only?
In testing, we found that the Abstract environments work best as environmental reflections and performed less well for illumination. As we are essentially sampling for lights, once the ratio of light to dark drops to a certain point, artifacts start to become apparent and increasing the number of samples will not eliminate them. We are aware that some rendering software vendors are developing their own methods for dealing with these “tiny dot” issues. When the issues are addressed by a number of rendering vendors we will remove this recommendation.
