Custom Brush - lineBitmapStyle tiling

I am trying to make a dynamic brush simply based on a bitmap in the library (sortof like how you can set a brush in photoshop).

However- when I have tiling=true, it looks very unorganic, simply “revealing” a tiled repetition of the bitmap.

I think setting tiling=false uses the same mentality, just revealing a single large bitmap.

Any hints on how to efficiently make a dynamic brush in as3 (i.e. paint a particular bitmap along the path of mouse movement)?

I guess I could just draw the bitmap to the canvas at current x,y, or all along the path of movement… but I like the idea of just using lineBitmapStyle…