Hi! Love he colors and perspective. I think the issues with this one is that the branches(?) are shaded with a different light source in mind than the main figure. There seems to be some sort of sunlight falling onto the shoulder of that person - I would stick with it. Another point: unless the light comes completely from the back it should illuminate more planes of the figure than just it's silhouette (see A). For exercise I would recommend shading basic shapes like cylinders, spheres and boxes in various light settings (see B) - there are ref images for that. Hope it helps! | Artwod Feedback