Blog: http://gurneyjourney.blogsp... This channel is for plein-air painters, concept artists, illustrators, sketchers, art students, or whoever wants to learn more about drawing and painting. Gurney is the author of the popular blog "Gurney Journey" and the bestselling books "Color and Light" and "Dinotopia." http://jamesgurney.com/
Casein is a water-based opaque paint that uses milk as its binder. It's the oldest paint known to humankind, and was popular before acrylics. I like it because it combines so well with gouache and other media.