Retro Reds: Step by Step

After years of traditional drawing and painting, and years of using Photoshop for photo manipulation, I decided for purposes of a new series I'm working on to combine the two skills and use Photoshop to paint. I began, as I always to, with a physical drawing. But that's where tradition ended. Here's a step-by-step series of images, leading up to the final. Total time: 12 hours.