What makes 3D look Hand-Drawn?

To make 3D animation look hand-drawn, simply adding line art isn't enough. The key is replicating human imperfections found in traditional frame-by-frame drawing. The recommended technique involves applying displacement to both the mesh and line art whenever the object moves, simulating the natural inconsistencies of hand-drawn frames. Combined with animating on twos (showing each frame twice), this creates a convincing hand-drawn aesthetic quickly and easily. Other methods like rigged lines and stylized shading also exist but are more complex.