A "Level 2" Menger sponge. I purposely subdivided the blocks of the sponge to slightly less than 1/3 (3/10 instead of 3/9) to create the gaps between sub-blocks.
The recursion was purposely stopped at 3 iterations (yes, a "Level 2") to keep the object count down. This image has 8,000 objects (20^3), but at 4 iterations, that balloons to 160,000 objects!
Modeled in Structure Synth and rendered in sunflow. I'm also trying a different lighting model in sunflow for this one to cast even more photo-realistic lighting [a spherical light source, plus ambient occlusion global illumination, with diffuse shaders for the object and the ground plane].
©2009 David C. Pearson, M.D.