When checking if resolution scale affects film-grain scale (which seems to be the case: lower resolution has bigger noise; higher resolution has much finer, smaller noise resulting in overall clearer image versus lower resolution) (AREXP-490), I've found that the NV post-process does not re-initiate after resolution scale changes or fullscreen/windowed switches (e.g. RAlt*+Enter). The resulting view is identical to a normal non-NV sight since the post-process does not get applied.

Tested in singleplayer GM only, haven't checked in a mulitplayer session yet.

* LAlt on default settings is set to freelook, so the scope view is exited and re-entered when LAlt is released, so the problem won't be noticed that way