Tutorial 45 - Folds, Creases and Edges (Patreon)

Here's a demonstration of one way to render geometric features. Good for some types of materials, like paper and other matte surfaces, some parts of buildings, types of metal and plastic. Painting hair using this method is also good, especially if you want that 3D look or anime style. 

The most important factor is the values. The values should stay fairly close - dark grey, or light grey but never black and never white. This gives us more flexibilty when it comes to final touches with textures, highlights and adding shading, as ambient occlusion.