Wrap > Push Shallow removes triangles and tetrahedra (offending “pyramids”) by propagating through the surface in a selected area. Applying Push Shallow to one of the triangles results in the removal of the selected triangles and the exposure of the triangles underneath. For example, if your point set is a cube with points evenly distributed throughout the inside of the cube, you can use Push Shallow to remove small segments of the cube and create a different shape.
To perform Push Shallow, select one or more triangles that are part of an offending web structure, and click Wrap > Push Shallow.
See also Push Deep.