Strange result of an experiment that ended up being useful for texturing and giving unique sketches. It has a slight outline to add some more interest.
Dual brush mode can be turned off if the burn blend mode is not desired.

- Surprisingly good for sketching, change paint mixing settings for a different feel
- Because of the burn mode overmixing will create darkness, if you don't want this I recommend separating sketch and colour layers :3
- It is quite a blocky brush but the slight outline gives it a bit of softness, especially when using it for lighting.