About 1/4 up on the left side of the rocks in stage 3, there are three light areas which are mostly vertical. Though they are clearly in the reference photos I have, they are distracting. I felt it important to make them less obvious. In several areas on the rock, I increased the contrast between the light and dark areas. Also, I painted the snow at the bottom between the rock faces. In this 4th stage, I also darkened the valleys in the snow and painted in the dark areas on the right of the painting.
In the next phase, I will begin working on the mountain lion.