Allow shell start to be negative.
If the PRT Volume could pad the bounds of the levelset by the distance that the shell start is below 0, you could make volumes larger than the original mesh. Further, if the thickness was super huge, you would end up with no culling, but a solid block of particles. These could then be culled in the modifier stack using KCM’s reading the signed distance and outputting selection to the delete modifier.
In effect, we want to generate blocks of points and sample data from the mesh, but not cull with it at the same time.
- Chad