This daemon creates a scalable sphere to delete particles from inside or outside this sphere.
Fit to object
This button fits the daemons bounding sphere to the dimensions of an object. By clicking on this button, a node browser appears where you can select one item. Automatically adjusted daemons always have a small cache around the reference object. You can also adjust the daemon's sphere' with the "Scale" and "Position" parameters of the → "Node" panel or the R and W keys.
...
This is the sphere's size in metres.
Inverse
With "No", When disabled particles will be removed inside the volume, with "Yes", when active this happens outside.