You can however create a textured vector brush which combines both Harmony's vector and bitmap drawing capabilities. When drawing on a vector layer, brushes are solid vector brushes by default. You can use bitmap brush tips, adjust your line's hardness and opacity, combine two tips and apply a paper texture to your brush strokes so as to adapt the Brush tool to a variety of art styles and create natural-looking brush strokes.
Using textured brushes, you can create an infinite range of fuzzy, textured and watercolour lines.