Build up the lighting
Using my Bristle brush, I like to think in layers of light. After brushing in some light, I’ll increase the value just a little bit more and brush that in. Then I’ll increase it a little bit more, and brush it in. I do this all the way up to the highlights.
I try to be reactive in my painting process and make changes as I need to. This might include using an Overlay layer to brush more colour under the eyes, or darkening shadows to make his cheeks more saturated. I also slightly change the design over time (it’s a good thing that I’m not too attached to my line work!), using tools such as Liquify.