"Custom" Oil Brush, Is it Possible? Not just those Standard Oil Brushes on TVPaint

[TheQuestionMark]

So I recently decided to use TVPaint Oil Brush and I really like it! I made my setting on the Oil Brushes to make it look medieval or Renaissance. But the Oil Brush doesn't seem to be friendly to 4K resolution or doing 300 DPI Prints. You can only use Silk for Higher Resolution.

And really need it to Custom Oil Brush for doing Trees/Vegetation and make a wider spacing rake brush.

So is it possible to add Custom Brush for Oil Brush? Please add it Custom Oil Brush to TVPaint 11.5 Pro or Sooner!