In general I am more or less just interested in lighting rooms and lighting situations like these are most interesting for me: 1, 2
As far as the biased unbiased thing is concerned I am not able to have a real opinion. I liked V-Ray’s results and in one of the PDFs for Thea it says:
There exists an old “trick” which is to use a high gamma value and then add contrast and saturation to it. Some render engines do this by default as they are more focused on making renders that looks closer to how our eyes see reality. This of cause alters the way light flows inside the scene and is no longer physically correct.
I understand: photoreal is not what you see in reality anyway. To me it is just important that things look somewhat beautiful. (The lighting for the images on the two sites above looks very good to me…)
I had found this out, but still when I use Thin Film glass the light loses energy on its way through it?! Even when just using a single surface?!
No, there are double-glazed windows in the example and I already used Extended Tracing. But I just turned it on and played with values without exactly knowing what I am just doing… My results are good, but pretty slow.
I guess that is the real reason why I need a nice GTX card. When being patient my CPU is perhaps fast enough for a final rendering, but it’s not enough for having a good time while experimenting…
So, when something looks (just slightly) overexposed I still have all the data I need to get a proper image in PS/LR?