Round brilliant cut Houdini HDA
Last year I have developed the basic cut algorithm for create a polyhedron with predefined facet angles. The algorithm can be used particularly for a precise gemstone cut modeling, especially a brilliant cut with it's strict requirements. This algorithm is now becoming a tool (under development). Additional options for realistic look: edges filleting with variational width and cut imperfections
Model of brilliant cut created with the main parameters of Tolkowsky cut: crown angle 34.5, pavilion angle 40.75, and table size 53%
The same model, perspective view
Filleting test with a width variation along edges
Optional cut imperfections
Any closed polygonal 3D model can be used as a base mesh
Other gemstone cuts are also possible. I'm working on it :)