we are artists
##Basic:
- alpha slider
- line width slider
- line angle slider
- lines brush
- circle brush
- scattered points brush
- scattered lines brush
- scattered circle brush
- control direction by right mouse
- control direction by brush
- control direction by gradient (get gradient from ImpDoc)
##Bonus
- clip brush strokes to the region as they're being painted
- when the cursor is in the painting window, a marker appears on the original image showing where you're painting.
- color scaling
- "alpha-mapped" brush stroke
- Add a control to swap the contents of the painting window and the contents of the original image window.
- Own designed Ink Brush
- filter kernel design interface
- add a "mural" effect
- create painting automatically
- Another gradient