It is very simple: a plane with a box. Only one material applied: a phong plastic. Environment is a basic sun/sky system. I rendered all these images with SS1.
I wrote down some notes I want to keep in mind for myself. Maybe these may come in handy for developers too, who knows?
Generally, I find that the GPU acceleration gives excellent results (fast and with no artifacts) in the indirectly-lit areas, but it is still a little unefficient in the reflection areas (maybe it's a PT algorithm limit..). To get an overall accurate result it is still good to stick to PT+MLT, which gives correct results and it is faster than BiDir MLT.
IMPORTANT NOTE: I am running on winXP 32bits, so these tests are useful for the users who cannot locate large amounts of RAM, so they have to keep the supersampling to 1. Probably, increasing the SS to a higher number will produce less artifacts while using the PT algorithm.
