Remove the faces of a material that are defined only by vertexes shared by the material and the input mesh. It also removes any vertex and edge that only define deleted faces, they are not left dangling. If the mesh removed covers at least all the faces included in one or more layout blocs, those blocs are removed, freeing final texture layout space. Only faces that are completely enclosed in shared vertexes are removed, as well as only the vertexes and edges completely enclosed by deleted faces, so the remaining geometry is unaltered while there are no floating vertices or edges left.
Avoid clipping problems with close geometry like tight pants.
Avoid clipping problems on morphs applied under existing features like a fatness morph under a shirt.
Optimize resources excluding unseen geometry like the scalp of a head with abundant hair.
Heavily optimize resources excluding geometry and whole blocs of textures that have been occluded by covering geometry like the torso and arms under a jacket.
Remove Mesh: Mesh to be removed. A kind of "negative mesh" or a mesh "mask", the faces included in this mesh are to be deleted from the material chosen in the node properties. Only the faces that this mesh has in common with the ancestor mesh section chosen are removed, along with any dangling vertices and edges left. Here is an example on how to create a remove mesh.
Material: Material without the removed mesh section. If the removed mesh is big enough to include all the mesh of one or more layout blocs, the final mesh layout does not include those blocs, freeing space for other textures that can actually be seen in the final model.