...AND 100% FREE ! ! !
Ever wonder what your renders might look like if they'd been painted but find the paint filters in Photoshop lacking? Do you use a PC instead of a MAC? Don't have the time/money/inclination to learn the hard stuff?
If any of that rings a bell, then why don't you check out FotoSketcher... www.fotosketcher.com/
Some of the brush filter options will take a wee while to render, but that's because it's procedurally calculating brush strokes based upon the lights & shades of the original image (whether it be a photograph, render, or screencap - so long as it can read the source image, it'll process it). For the more experienced postworkers, you can easily layer a FotoSketcher version with your original render if the paint or sketch effect is too overpowering (not to mention combining both and then doing some additional painting of one's own - how I think I may use it myself).
I must admit that I normally paint in Photoshop rather than use paint filters... b u t that doesn't mean I won't start to incorporate FotoSketcher into my process when it suits my task - as I'm very much in the pragmatist camp of doing what works rather than being a self-flagellating purist who must start everything with a blank canvas. For me, the end justifies the means i.e. I'll use whatever combination of techniques will give me the end result I want as efficiently as possible - that's why I started with 3D - to speed up the 'heavy lifting' phase of filling scenes, and it means I can do a completed painting in 5-8 hours instead of the same thing taking a week if I started with a blank canvas.
Alrighty, I'm off to do some experimenting.