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It is possible to control the thickness of the emission per control point. The final value will be CP thickness * Thickness.
Vortex
Set the control point's individual vortex strength. Positive values create a clockwise rotation, negative settings create a counter-clockwise rotation around the spline's path.
Axial
Set the control point's individual axial strength. Positive values create an attraction effect towards the spline, negative settings create a repulsion.
Radial
Set the control point's individual axial strength. Positive values create an attraction to the spline's control point, negative settings create a repulsion effect.