I'm building a blender render farm as a hobby project that renders tiles on seperate computers. My plan was to have an opengl render as background for the unrendered tiles in the preview but blender in background mode doesn't support opengl renders. Now I'm trying to render a noiseless image with cycles.
I use python to remove all materials and lamps from the scene and set ambiant occlusion to 100%. In the rendering settings the samples are the lowest possible and no bounces.
I thought that without materials and bounces that I wouldn't get noise if I render a single sample since the only lighting is ambient occlusion but I still get a lot of noise. Why?
What I want (this is 10 samples):
For some reason the single sample render is only 3 graylevels
Is there something I forgot to tweak?