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“I decided that for this tutorial I will be adding a lot more detail shots throughout the process so that you can get a better idea of how loose my brushwork really is. A lot of times when people see my work they say “that is a photo” or “he painted on top of a photo,” which I think is funny because my work is actually quite loose. I wanted to show that you can achieve….”
http://www.3dtotal.com/team/Tutorials_2/return_fire-escape/return-fire_escape_01.php