The masking region tool still seems to only work for the current view's disciplines objects. When working in an MEP view and wanting to mask something, usually it will be architecture/structure related, or at least have components that are A/S related. The masking region fails to be useful in these situations.
Can we have an option for the masking region tool to adjust what discipline it is working for? Or just some way to make it work in all scenarios a bit better.