http://www.domestika.org/en/courses/2791-speed-painting-in-photoshop-accelerate-your-creative-process

Learn how to sketch your ideas and work efficiently to create a digital illustration from start to finish Having the power to realize your vision quickly and efficiently is priceless; it means ideas and inspiration don’t get lost along the way. Artist and animator Gabriel Gomez using his speed painting technique in Photoshop to pay homage to the natural world, and tell stories through images. He has worked for clients including Netflix and Paramount, and founded his own studio, Citadel Animation.  In this course, Gabriel shows you how to paint pictures in Photoshop as efficiently as possible. Learn to accelerate your digital painting process to work quickly and fully express your ideas. Let your imagination be the only limit to your creativity.