Master dDo for Photoshop with this complete overview by Wiktor Ohman.
The Steam Mephit - Time-lapse Painting
Check out this time-lapse painting of a Steam Mephit for a Dungeon & Dragons module by Mates Laurentiu.
CGschool - Arch-Vis Training in 3ds Max, Photoshop and V-Ray
CGschool provides world-class architectural visualization training in 3ds Max, V-Ray and Photoshop.