Comp Study Sketches

Since most of my  "official illustration are still under NDA" here are a few quick colour/comp studies...mostly on the Iphone/Ipad.  The only PS file here is the Sargent study with which I am experimenting with colour blending FG/BG jitter in my brushes to better blend complements.  Can provide a tutorial if you find interest in the technique...I find it the closest colour blend in PS that matches traditional colour build up in classical medium.