I was messing about with keyboard combos in 2.80 alpha trying to remember how to add a render preview rectangle, however I seem to have done something that has masked my model in 3D space, which I can rotate around. It's on a global level as multiple objects are being masked the same way.
I am lost as to what I've done and how to clear it. ⎈ Ctrl⌥ OptB doesn't seem to work.
Hopefully this is something easy and I'm having a brain fart, otherwise it's an embarrassment to say I've been using Blender for 15 years...
