Hm. You could get Fraps, though it's a little iffy at times; sometimes it wants to work, sometimes not. I use the trial version (30 seconds per recording + water mark, but this isn't a problem for me since I can just edit the watermark out and most of my recordings are at max 15 seconds) but there is a full version available for purchase, and it seems to be of pretty good quality. The only concern is the amount of space it takes up. A single 30 second Fraps recording could take up anywhere from 200 - 600 MBs in size. Basically, if you leave Fraps recording on the full version your PC will crap itself because the file will become so immense that it exceeds your capacity. Sorry if I'm not of any major help, but Fraps is a suggestion. I just don't know if it works with the program you use for art is all. It's generally used for recording footage in games or YouTube videos.

If you did ever get it, for God's sake make sure you remember to stop recording lol. Because these Fraps files are BIG. 60 - 65% of all the space taken up on my hard drive is from Fraps recordings.