Here is a rendered view (-viewcapturetoclipboard of rendered view of Rhino 6) of my new snow crystal growth on mesh.
See
http://www.entagma.com/creating-a-procedural-snowflake/#more-1094
Render with V-ray3.4
Alpha = 1
Beta = 0.3
Gamma =0.0001
5000 iterations
Sphere mesh with ~320 000 faces