Splitting a Surface by Another Surface
- Select Intersect > Combine .
- Click the surface you want to cut.
- Click the surface you want to cut the surface with.You can Ctrl+click multiple surfaces that together completely intersect the target surface to fully cut the surface. You can box-select surfaces that only partially intersect the target surface to partially cut the surface.
- Mouse over the surface to see the regions created by the cut.
- Click the region you want to delete.