Huh. That's really amazing; it seems very counterintuitive that adding noise to the video would improve its look and seemingly bring out detail.
Does it really bring out detail, or is it just our perception? That's a serious question; it looks that great.
Let me put on my dunce hat and ask a stupid question. Wouldn't 35mm grain be more authentic for the OT than 70mm, even if 70mm looks better?