So I just spent like an hour or so with the IR Player in the AXE-FX 3. Checked many convolution reverbs and it even plays normal .wav samples too of any sound haha. But of course only like 1 1/2 seconds long which gives it enough for some quick ambience... However it could be nice for some lo-fi / experimental stuff. A lot of it sounded like you were playing in a coffee can or cheap resistor radio lol. I added a plex delay after it with like 10 seconds of decay time and that makes it a little more fun. Each IR player can load 2 IR's and there's two IR player blocks so you could mix 4 different sounds and also do parallel and series. If it could just do like 10 seconds of decay, that would make it so much better!
Anyway, got that out of my system for now. But yeah load of some reverb IR's or any sound sample in .wav and get some lo-fi / experimental ambience to your mix if needed.