Best way to draw a circle: integer raymarched sphere. Max world size possible in this system should be 2^30^3 virtual voxels (e.g. 1 nm to 1m each side). But detail that can be stored is obviously limited by memory. LOD scaling happens at 16x16x16 subdivision (i.e. 4 of the 30 bits per step). This particular sphere is generated implicitly, it only has a radius of 1400 voxel sides. Improvements to come.