One of the most ask question I receive for Blender3D NPR anime character are "How to render eyebrow on top of everything (hair) for anime character?". I achieve this by using render layer and mask.
Below is a quick explanation on how to setup this using render layer and layer mask.
VideoI have upload the turnable 3d render in both my Youtube and Vimeo channel. The eyebrowis always infront of hair but when view from the back, it will be block.
ReferenceDeviantArt Blender3D Rendering Eyebrow In Front Of Hair
Youtube Anime Girl Turnable Part 2
Vimeo Anime Girl Turnable Part 2