Make Invisible

Even if the clothes have shrinkwrap modifiers, it is possible that some faces poke through. We can not delete underlying faces, because then the shrinkwrap modifier would make the clothes collapse. Instead we can hide faces by assigning a new, invisible material to them.

Here Aiko's nipple poke through her bra.

Select the faces below the bra and press Make Invisible.

An transparent material is created and is assigned to the selected faces, which thus become invisible.

Here is the invisible material.