In other words, is Y up, or is Z up? It’s a loaded question. My little lesson from the course is here, in case you don’t know the issue. What’s more entertaining, and the point of this post, are the answers I got back from the people I asked.
Speaking of cameras, is there nothing that three.js cannot do? Check out this incredible piece of wonderfulness and have a webcam ready. Or go right to the demo, and then the other demo. It’s one of those “of course we should be able to do that” kinds of things, but to have it just one mouse click away (assuming you’re set up to run WebGL; if not, go here).