So lately I've been messing around with a vector drawing/painting program called
Mischief, and it's really interesting. Because the program is vector-based as opposed to raster, filesizes are small, and you can work within what they term an "infinite canvas". Mind you, even though the artwork is vector information, it's a proprietary technology (which is referred to as
Adaptively Sampled Distance Fields a.k.a. ADF) that isn't handled the same way as Adobe Illustrator with splines and bezier curves, and as such can't output files useable by Illustrator. What you can do, however, is output layered Photoshop files at just about any size and resolution you want, up to a max width and height of 20000 pixels-- at 300dpi, that would translate to about 67 inches! I did notice that outputting a piece of art really small, say an inch high at 72dpi, introduces some odd artifacts, but I'm more likely to output a file bigger than smaller so I don't consider it an issue.
I've never really been comfortable drawing lineart with Photoshop, because I had problems with the quality of the linework. Mischief offers a
freehand curve smoothing feature that takes care of that rather handily; I find that I genuinely enjoy drawing within the program, especially on a large Cintiq with multi-touch. It feels natural, it's just a really smooth experience overall.
Painting with Mischief, on the other hand, is still something that I think could use some work. The toolset is pretty barebones, and kind of reminds me of the early days of painting on the old homebrew app Colors! for DS. But I have no doubt the developers will get the program up to speed sooner than later.
Here's an attempt to create an illustration fully within Mischief:
Still a bit rough around the edges, but with a lot of potential, I'm really digging Mischief. At only $25 for both the Mac and PC version, it's definitely an affordable drawing and painting program worth checking out.