Shading and lighting is a very common problem people struggle with while doing art. Ask questions about light sources, places that are the darkest, and places that will most likely always be shaded or highlighted. FAQs: Tips from @ashetrees : Always figure out your light source first. It helps with highlighting and shading at the same time. This step is completely your choice or you can follow a light or shading reference you find that is pretty. Here is a video that you might find useful: https://www.youtube.com/watch?v=cxn-2GsKIdU
