Thank you, glad to hear you are getting back into it. As far as shading goes, the key feature is to always remember what direction the light is coming from. A lot of that up there is guess work, the darker sides always being away from the light (like the curtain, for each fold closer to the patient, the darker side is not exposed to the light, blocked by the fold itself). Really though, the biggest thing with shading is fading. Its generally a smooth transition and has almost all grades of pencil within it. To make it look smoother, I always use my fingers to blend it together. Hope that helps.