Occasionally, Blender’s global community steer it beyond the official 3D pipeline. An example of this is Grease Pencil, which blurs the lines between 2D and 3D. Picture a spectrum. On one end, Grease Pencil helps you create classic hand-drawn animation, using the digital version of traditional tools like onion-skinning, tweening and key frames.
In the middle of this same spectrum is the ability to treat Grease Pencil pen strokes like 3D objects (that’s because they are, in fact, 3D objects). Which means you can modify each line with sculpting brushes until you get it exactly right. You can even use Blender’s material system to create NPR materials for your animations.