Fix for sculpt mode: invert visible hides all faces with Multires modifier #95419 Grids face indices should not change on the fly based on hidden state. It caused the rendering glitches shown on the original bug report and the attached recordings. * this PR removes the unnecessary check and dependency of grids visibility with the smooth/sharp of faces. * replaces smooth flag for sharp flag which better express the intent and simplifies the logic. Pull Request: https://projects.blender.org/blender/blender/pulls/121929