See how Alexander Koshelkov created his Luftbanza Airlines image in Photoshop.
Gnomon - Design Techniques for 3D Concept Art
The Gnomon Workshop present Design Techniques for 3D Concept Art, a DVD tutorial by Gavriil Klimov.
Art for Games - Memory Folds in Clothing Tutorial
Art for Games have posted a free tutorial on creating memory folds in cloth, using ZBrush and Photosohp.