I have two question about PyroFX.
1. I want to know how it's possible to "group" voxels according their temperature or velocity, so I can apply a force just to them. For example, I'd like to apply gravity only when smoke is very cold or I'd like to apply a turbulence field only to smoke (again cold voxels) and not to flames (hot voxels).
2. I'm working on a pyro simulation for a missile trail and I want flames diverge a bit, I tried some expand objects, but with no success, so I thought to create a custom velocity volume using volumevelocity. If I use a sphere with velocity according its points normals to expand gas, it behaves strangely, instead if I use a box with an upward velocity, the gas rises in a predictable way.
Thanks in advance for any help.