vaderios said:

see this:

And tell me

-Angel

That's probably more realistic, though the blue on the outer cave area (the entire area of the cave left of the door and Chewie) would have to be de-blued and darkened. I wonder if some hi-def footage from some of those nature blu-rays would work to put in the cave exit area...

I would imagine it would be dark (as it is stated that nightfall is approaching) but that you may not be able to see too much detail, as there would be a lot of wind and snowstorm type activity outside. I would also say that the Han outside shots need to be darkened (or at least how in some 80's films the upper half would be darkened - something to indicate that it is nearing nightfall).