appeared that the standard size (64x64x64) just works fine for small scenes, like a single character in a small environment. Larger scenes and larger environments became exponentional slower. Disadvantage of larger octrees is longer build time, and overhead traver- sing it though, so something to tweak based on some experimenting. A table with test results + blender file will be in CMS soon. New button is in F10 Render panel, in bottom. Last free spot there! O_o Sizes supported now 64, 128, 256 or 512.