In toon shading, a duplicate polygonal mesh created at an offset to the original surface, used to create a toon outline along the surface. This 3D mesh creates toon lines visible from any angle, enabling fast tumbling, sharp line angles, and excellent frame-to-frame coherence in animation.

The offset mesh option works well for many types of shapes, but not all. For example, intersecting surface regions with thick line widths may result in thin lines that do not connect well to the surface. In such cases, using the default Paint Effects style profile may be the better option.