for those interested in some painting techniques
In this case, Im still laying down a basic set of colors and values in a single "overlay" layer on top of this textured brown gradation that you're seeing on the left.
This isn't unlike how you might approach an oil painting. Coloring in the overlay layer is giving me the opportunity to keep my lighting an values consistent. Once Everything is blocked in, I'll flatten out the overlay, and start working in normal layers, but this is a great way to work things out in the beginning.