I added highlights and shadows to the second set of peaks. It is at this point we subtly start to move away from monochromatic blue color pallet. Starting to move toward the browns and greens that will dominate the next set of peaks.
I added both highlights and shadows into the back two peaks. Withe snow detail and forest silhouette along the slopes. I will have to let the first two peaks dry before I can move onto the next one.