This tutorial covers a process for quickly sketching studies that focus on colors and values rather than details.
Over the recording of 3 sketches sped up 2 times, I'm talking about the state of mind behind making these quick studies. I'm explaining how to take the most out of them so it translates into a visual library that can be used later to paint from imagination.
Color studies are not about mindlessly copying a reference, but rather grasping the overall feel of the color scheme by making it your own through a process of trial and error far more beneficial to the learning process.
An additional PSD (the burning clouds image) demonstrate the grain post-processing technique that helps to give a more organic feel to the final sketches.