I have a scene that is mostly empty space with a few simple objects scattered around. If I render just a portion of the image with just one of the objects it renders within a few seconds, but when I render the entire scene it spends a long time rendering tiles that contain nothing but empty space with each tile taking about 3 seconds. It’s a high resolution image, so it has to render 14,100 tiles. At that rate it’s taking just over an hour to render the whole thing! I’m guessing that if it wasn’t wasting time on dead space the render would be done in maybe 5 minutes.
Any idea how to get Blender to not render empty tiles? I’m using cycles.