I noticed whenever you were working on the teeth up close you were able to quickly zoom in, take the camera behind the tooth, come back out of the mouth and continue working. Whenever i try working like that i have to spend 30 seconds like "pan..pan..pan...rotate..pan.." It almost seems like the camera rotate has a different origin point perhaps?
EDIT. So i tried this suggestion and i seem to be unable to fully use this ability in the same way you do in the video. For instance when you pain the mask on the uvula part you are able to get in and paint the mask on the backside of it without a moments pause. However even when i use the focus "." key, no matter how close i zoom I end up getting blocked by the outer parts of the mesh.
