This tree-like surface was generated with a single mathematical expression using the implicit surfaces filter in MeshLab, and a shell was added to the isosurface as well in MeshLab. A hole was added (subtracted?) at the bottom to reduce the overall volume.
I also have a larger version, slightly thinner in appearance, here: Implicit Tree 114mm.
Please check out all of the other implicit surfaces in my shop. implicit surfaces at vertigo polka
6.386 w x
6.47 d x
2.514 w x
2.547 d x