...
You can choose from three fall-off types: “Linear”, “Squared” and “Cubic”. The fastest attenuation is achieved with “Cubic”.
Bounded
With “Yes” the "Vortex" daemon is displayed with a stack of three rings around the axis. The radius ("Boundary") of these rings determines the zone of influence.
Boundary
Here the radius of the zone of influence is adjusted in metres.
...
To use this setting,”Vortex type” must be set to “Complex”. “Radius” determines the distance from the vortex centre in metres where the forces reach their maximum.
Bounded
With “Yes” the "Vortex" daemon is displayed with a stack of three rings around the axis. The radius ("Boundary") of these rings determines the zone of influence.
Bound Sup
This is the upper limit of the vortex.
...