If one part configured color solubility, the generated color texture seam between the neighbor parts will be gradient filled using this part's color with the specified solubility.
Demo: https://twitter.com/jeremyhu2016/status/1132159910815227904
Mesh layout and thickness adjustment are depend on base plane calculation. In this build, the base plane calculation could be limited to front plane, side plane, and so on, compare to without any limitation in previous implementation.
Replace triangulation algorithm with CGAL triangulate_faces, the quality of generated mesh improved a lot.
This commit also reduced max uv packer times.
Jeremy Hu