I've also created a UserVoice, so if everyone agrees with the idea, please vote upon it.
http://feedback.substance3d.com/forums/261284-substance-painter/suggestions/42596392-painter-2021-geometry-mask-focus-on-not-hidden-fCurrently substance painter 2021 release has added a new feature to be able to hide parts of a mesh and work with occluded parts, enabling texturing to be much easier, but currently the F key (Frame object) does not update alongside the visible geometry, meaning if you hide everything except a small part and frame, the objects focus will be the entire meshes bounds rather than the only visible part.
I suggest the ability to focus on visible mesh geometry as well as texture sets rather than full mesh bounds.