and he seems to select one panel on a crate then Shift H to hide the rest of the crate
but when i go into texture paint mode the whole crate appears gain in viewport ?
so what’s the trick here to have only one panel ?
otherwise seems that the paint will be applied to all panels!
Assuming it’s that tutorial, his crate looks to be made up of 6 separate objects. He modeled one side, then duplicated it and aligned it into a cube. So he’s actually hiding objects rather than sides.