In Blender’s Freestyle, a line set filters which edges are drawn using criteria like visibility, face marks

https://emilianohphy930.raidersfanteamshop.com/mini-split-line-set-considerations-for-older-buildings

In Blender’s Freestyle, a line set filters which edges are drawn using criteria like visibility, face marks, and material boundaries, allowing separate stroke styles for silhouettes and creases.