The render differences that are apparent when you split a file into two halves and render independently, can also be seen in the same scene between rendered tiles. I've marked where they appear on the attached image which has just finished rendering after 59hrs!
The settings on this were deliberately high to remove the grainy clouds visible on other tests at lower settings.
Settings were: detail .8, AA 5, GI 2,2, atmosphere quality 64 samples, cumulus 500 samples, (Oshyan, I tried lowering this to 300 samples but the graininess was still there). The two barriers on the right are not too bad but the other two are very noticeable and distracting. Are these artifacts a result of the high settings or are they just specific to this scene? I'd have thought that within the same render session this wouldn't happen. Also, on a different issue, what makes the bright area of clouds to the upper left look like melting ice cream?
Any Ideas?
Regards
Kevin.