When planning this painting I knew that I wanted to paint a deer again. The first idea to be sketched was a closeup of a buck facing the viewer with the far distant mountains and the eastern sky with the reddish belt of Venus behind it at twilight.
In the second sketch I replaced that one with three deer. The composition wasn’t working well because the deer were all facing the same direction and getting progressively smaller in that same direction, so the viewer’s attention would just follow that path straight into the bottom left corner. I took a photo of it and in Photoshop tried switching the places of the two left deer, which helped interrupt that progression. Then, just in pencil on the sketch, I tried drawing the mountains closer and with more size variation. By putting the larger mountain on the left it helped to balance the composition more, as the silhouette of its ridge slopes down to the right.
The deer used in the second sketch and final painting are from a photo I took through the front window of my old house several years ago, with a few adjustments.