About this 3D model

The tree is mostly hollow to minimize plastic and warping. this refers to file: willow_110210a.stl I was playing around with geometry and this reminded me of a weeping willow tree. In a view looking down, the branches are a series of sine waves. The internal shell is an ellipsoid. see thing:6397 for different iteration of this that I liked better, but could not print due to warping.