I've been fighting with a difficult render these last four days. The setup has worked several times before. But one scene is different: At the end there is a slowed-down shot of a mountain area in Norway (only about 600 m/1800 ft above sea level) shot in October. The colours are brown, orange and grey and it was raining. That scene rendered terribly, as if it was heavily pixelated. I tried almost everything.

Then I read something BillyBoy wrote in another thread, about two-pass rendering being about optimizing the render to what each part of the video needed - something like that - resulting in better streaming and smaller file sizes (I'm not quoting accurately here, but this is what I thought he was saying).

I had the two-pass render enabled just because I believe two is better than one. So I unchecked it, and the render came about beautifully. The file size even came out smaller than it used to be. I do not understand any of it, but I think it will be a while before I try two-pass rendering again.

Tor