Parametric-brushes

Parametric Brushes

Contextual Menu of Vector Brushes on the dialog list

Edit Vector Brush > open vector brush editor with the current brush.
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New Vector Brush > open the editor.
Duplicate Brush > =
Copy Brush Location > =
Show in File Manager > =
Delete Brush > =
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Refresh Brushes > =

I would also suggest adding the shape of irregular polygon into the settings of parametric brushes (Zabadal).