Funny, but insulting me cannot change the fact that Paint.Net has only ONE poor paint tool.
All free paint programs you can find on internet offer dozens of different paint tools, and there are ones that even simulate water colors, like ArtRage 2:
http://www.ambientdesign.com/artragedown.html
Looking at the simplicistic Paint.net pencil brush one cannot avoid to think that this is an amateurish project without any practical use.
I just do not understand the design choices behind this software, where a lot of effort is put in some advanced effects, but ironically the most basics tools are missing, forcing the users to do some messy acrobatics with the interface to emulate them (as we can see from the tutorials in the forum).
I believe the cause lies in the fact that a programmer, not a graphician, made the design for Paint.net. And programmers do not have any hint about the graphicians workflow, and believe that adding some fancy layer blending option is more important to adding an airbrush. But maybe I'm wrong, and those above are well pondered choices to reach some goal that baffles me. If this is the case, then sorry and bye bye.
george