First Person View
Thought I'd have a go at a view from inside a space helmet, since there's potential for a shot like this in the trailer. The main test was the refraction of the outside edge of the visor - it might look better without that border so that the only thing visible is the glass.
Here's an animation to demonstrate the effect in motion: (Sorry about the bad quality; the combination of .jpeg compression and .gif compression didn't do it any justice)
Also, by playing around with the refraction settings a fish-eye lens effect could be created. By using this we could feign the illusion of 3D depth on a flat image plane so, hypothetically, we'd only have to create a 2D image of the scenes which use a first person view instead of modelling, mapping, and texturing in 3D.