TwistedBrush Free - Version 3.5 Digital paint software with complete natural art tools. Software for artists without the complexity of other art programs. Compare us to the other "natural media" art programs. Oil paint feels thick with color. Airbrushes feather their spray the further they are from the page. A variety of blenders range from dry dust to wet to semi dry smudging. Chalk and charcoal are...well...chalky. Oil pastels mix and smear. Incredible effects.