You can choose this option with the select mask and split tools; but has the way it works changed? Maybe I’m remembering incorrectly. I thought that previously if you chose this option, your action (splitting or masking) would only affect front-facing vertices that were visible to you from your viewpoint. If a front facing vertex was hidden behind other geometry, it would be unaffected. But now I see that all front facing vertices are affected, whether visible or not from your viewpoint. Am I remembering wrong, or is this a change? Thanks