Is anyone else getting weird .png’s when saving renders made with recent SVN builds?
The default cube saves like this:-
It looks fine in the render window, and I can save all the other formats that I tested - .tif, .exr, .jpg, .tga and the official release saves normally.
If I save it as a .png with RGBA enabled it saves normally except with no background colour. So it’s no big deal, but I guess someone might want to know.
O2 is the highest optimisation you should ever do in Blender, higher and more aggressive forms of optimisation (like fast-math et al) will introduce errors in calculations. In renders it manifests often as artifacts, like black or white spots. For that very reason, the official builds we make don’t have optimisation turned on.