Rendering and shading can be difficult when beginning. The biggest feedback I can give you is using references. The Astro head is an amazing reference, because it’s simplified. You don’t need to blend all your shadows. Practice edge control and using hard brushes only, and blending those hard edges only when needed. Play with blending modes. I like to use “multiply” wood than shadows, and using “hard light” or “add” for the light. Here I used a purple shadow and a warm light to create more contrast between light and shadows. Hope it was helpful and keep up with draw and painting from references. | Artwod Feedback