FFX Velocity Paint
This modifier allows users to paint velocity vectors and store them into the vertex channel which can be later used by FumeFX sources or NodeWorks particles.
Parameters
VertCol - Enable this option to see actual vertex colors that are written to the mesh.
Reset Colors - Clears all the colors.
Set To Normals - Set vertex colors to point in the normal direction.
Opacity - Sets the brush opacity. Smaller values will allow you to slowly mix existing velocities with brush strokes.
Radius - Brush radius.