Jaguar Painter CD - http://www.kewlplace.com/sinister/prod01.htm Official product page includes screenshots and ordering information.
Painter - http://www.myatari.net/issues/oct2003/painter.htm Review includes game description and screenshots.
The Atari Times: Painter - http://www.ataritimes.com/article.php?showarticle=349 Review includes screen shots.
