Center Coordinates box
The center of the spokes is specified in UV coordinates.
U u coordinate of the center point of the pattern.
V v coordinate of the center point of the pattern.
Number controls how many spokes will be generated. If you use a large number here, you will need a small width or the spokes may blend together.
This slider controls the fade to black across the spokes, along the circumference.
These sliders control behavior along the radial lines- watch out for overlap of the settings, you may not get what you are looking for if you set the Start after the End, for instance. In UV space-ish dimensions.
Radial St Falloff
Radial End Falloff
This slider sets the width of the spokes. In regular mode, it is degrees. If the Constant Width box is checked, it is scaled to a more useful range.
This slider causes the spokes to taper smoothly as they get further from the center. Disabled if Constant Width boc is checked.