About this 3D model
Here's another variation (the last?) on the ball in cage design. I used Groboto for the basic model, distorted it in Sculptris and then added the ball in Cheetah3D. The first time I printed this, I had the "puddle" horizontal but the grain in the cage looked odd since it printed it at an angle. For this version, I printed it with the cage vertical and the puddle at an angle. The grain came out fine then.