With the blue light source you could go for a really nice directional lighting on the character in the same colour to make him really pop. Don't forget that he also needs to have shadows just like the mechanical leg in front of him. So that he feels more grounded and connected to the scene. So far also you have rendered about the same level of detail all over the scene, which makes the character less of a focal point. If you play with light and shadows a bit more to create contrast, the scene will get more interesting. Things in the background could be a little less detailed, and even the character itself is very uniform in its detail level. | Artwod Feedback