[Xiaomi Mi Note 2  ROMs, Kernels, Recoveries, & Oth] N3OMOD:
So, after taking some more tests (a lot actually) and combining the every-day usage feedback here is what I have to report, and hopefully it will help further development. ?

Following Kris Chen suggestion:

I’ve tried to “brutally” install the SultanXDA Camera Mod intended for another device on my Note 2: since the modification was intended to work on Google Camera app for custom ROMs with Open Camera API 2 I hoped that It could work well also on Note 2 with RR.

Surprisingly the results exceeded my expectation: Google Camera on RR (which is also the default camera app) showed better results in terms of:

-	Automatic Exposition: now more accurate and less influenced by rapid changes of ambient light

-	Automatic Saturation: now less incline to over-saturate (with a default level 5 setting)

-	Automatic Focus: slightly better, although in most cased a manual tap-to-focus is required in order to achieve the desired result

-	Noise has been reduced by 45% with Automatic ISO in medium light scene. Night scenes and High-ISO scenes still causes abundant noise, as described before.

-	Panoramic function works good, both in Vertical and Horizontal. Tested in bright daylight with no errors. I still have to take some tests during night and with artificial lighting so the feedback for now is partial.

-	RAW is still non-functional

-	HDR has still a lot of background noise, but in daylight is a bit better.

-	Chroma Flash is still non-functional

-	UbiFocus Mode doesn’t work past the “image capture”: 5 shots are fired but not saved neither processed. The Camera just freezes after the last shot. (UI seems responsive tough, just live view is frozen)

-	Almost every app which access the Camera has problems with it: live view mode seems ok, but when actually “taking” the shot the image is underexposed and “zoomed-in” on an arbitrary point.

Also – and this is weird I know – I found out that by avoiding installing any other camera app upon fresh install, the default camera app seems to have much less problems.

I know, this doesn’t make any sense actually… I just report it because I tried 5 different times (wipe, fresh install, different configurations) and each time results were similar.

Yes, I noticed this too while using OpenCamera. Have you tried anything else?

Leaving aside now the “photography” aspect of this ROM I noticed some other problems:

-	The volume level for all the audio executed through the hands-free speaker is extremely low: phone calls are nearly impossible to take if not in a perfectly silent room. While driving is actually impossible to hear the other person.

-	The same problem with volume level is present with VoIP Calls (for example Telegram and Skype) but in general for any media content. Audio level trough earphone or standard speaker (I don’t know if it has a proper definition, so beg my pardon. It’s the speaker located top of the phone, the one used normally) is fine.

-	Bluetooth pairing has caused me a lot of troubles with my Car Multimedia System. Suddenly the “telephone profile” refuses to activate and I can’t take or make calls via Bluetooth while driving. I will do more digging regarding this problem to find out if this is related to RR or to my Car Multimedia System not accepting Android 7.1 pairing.

- Charging also seems to have some minor problems. Sometimes, when connected to a regular 5V 2A charger the phone won't recognize it as a standard charger and starts the "slow charge" process. I tested 5 different cables, all with the same result. Mostly a reboot solves the issue, but some times I need to power off the device.