I think I know what you mean. Sensory deprivation or not, the main point is indeed to somehow enhance the watching to try experiencing what's going on in the screen more vividly, as if you yourself were going through it.
It doesn't need to be a full stage: just a little detail can make a world of a difference. For example: when I read Planetarian I still could hold alcohol, so when the MC found the whiskey I decided to take a shot as well (and it was also very cold at my house those days)... you may or not believe it but, with just that, *BANG* I was there. The rest of the reading was just mind-blowing, painfully and joyfully intense.
Sola is one of my absolute favorites ever, so best of luck with it.