Not really a suggestion, just some wondering
I've seen mentioned that there are some options, namely for the airbrush tool and the lighting of the canvas, that are hidden, in order to make artrage more user friendly, and the tools more natural. As was mentioned an airbrush with 10 different dials would not be an airbrush anymore :P
While that is proven to be a good choice indeed, judging from artrage's current usability, I think it'd be interesting to have a way to alter some of these options (which I suspect exist in every tool). Perhaps not even through GUI; just an ini-type file, changing stuff only when present. There could even be some exchange of ini files with options to achieve this or that effect, through the forums.
Usability would basically remain the same, since there'd be no gui changes/cluttering, people not wanting any changes would simply not have such a file, and people not wanting to edit a text file to experiment , would still be able to download other people's settings.
The downside would be that it would perhaps lead to fidgetting with numbers on Notepad more often than what would be appropriate, but then again that'd only be optional.
Would that be possible or even desirable ?