Blocking in light
When it’s time to block in the light for the wolf, I add a new layer that I link to the base wolf layer by pressing Alt and clicking in between the two. I set it to Soft Light and begin working in the basic light. I suggest trying Overlay, Soft Light and Hard Light, and seeing which one works best. Think about where the light is coming from, work in more yellow light where the sun will be hitting, and some green bounce light on the surfaces where direct sunlight doesn’t hit, but which is affected by the surrounding green light of the forest. Once I’m happy with how the image is developing, I merge some of my layers by going to Layer> Merge Layers or by pressing Ctrl+E. For personal art, I try to have as few layers as possible; my final art is almost always one single layer. But for professional work, it’s better to keep a couple of layers in case the client wants to change certain elements.