I trying to speed up cycles 8k render (even completely empty space took significant time to render..idkw!) by rendering border (region) and fill rest of transparent space with solid color.
Result I want achieve (render just border (region) and in composition fill rest with color):
But I have this result which is wrong..
Mayby I'm missing something - so question is simple - Is there any way to render border (region) and then fill outer area in composition?
Edit: After testing it's possible to have good result just by changing window in blender from 3d view to node editor.. But scene is scripted so this solution doesn't work for me :(
PS: I cannot use image as background - it has to be generated node as RGB or similar because is part of bigger project.