Actually something I did notice was how the quality slider can affect the amount of light that apparently is hitting a surface (and hence its colour in the image). In attached image the main part was done at a quality of 25, whereas the two strips were plop rendered at 0 and 100 quality. As you can see, not just a banding effect....

Must say I wouldn't have thought that would happen.

Dreams are just nightmares on prozac...
Digital WasteLanD