Once you get the hang of shading it becomes gradually easier to do. You need to imagine your object in 3D and then imagine where the light source is coming from. Wherever the light hits the object (remember, light radiates outwards in straight lines) that\'s where you\'ll have the brightest areas and shines coming from metal things, and on the opposite side of that is there the darkest shadows go.
Always keep in mind the material and shape of the object. If it\'s round, the shadow isn\'t going to suddenly start halfway down, it\'ll be a gradual change from light to dark. Materials like cotton or rough fabric doesn\'t shine, but metal, silk, plastic etc does.
Other objects can create shadows on eachother, so also bare that in mind. If you\'ve got a guy with his arms crossed, his arms will create shadows against his chest and eachother. They are obstacles blocking the light, so always be aware of that.
