There’s a very prominent connection between the type of material and the look of its shade. It’s important to keep the same direction across all the different objects in your drawing. So when you want to add a shadow to any object, you have to first decide from what angle the light is coming from as this dictates which side of the object will receive light and which side will not and therefore be shaded. In other words, if the light is blocked by an object, the surface on the other side of the object will receive less or no light and thus create a shadow. Shadow is nothing more than the absence of light. To understand shadow, you need to understand light. By understand the simple principles below, you'll feel more comfortable when attempting to add shadows in your next artwork.
In this tip I’ll share the basic things you need to know if you want to start practice and get better in shading.