From OP8Pro 10.5.6. This will not work on other OP devices merely by sideloading this apk. You need The newest Camera Services (2.2.13) and Picture Processing (installed into its own new folder.) Even then, you must use the app icon's shortcuts to launch and only Pro mode and Video work (from there Panorama and Slow Motion work.) All other modes crash. @voltesar on Telegram kindly made a Magisk module for me to simplify installation. You can grab it here: drive.google.com/open?id=1QSfZMP8cnbj0KakioVZ0Pe1j8HOeiJZL

Caution: removing the Magisk module will not restore your old camera. You must manually put the 3.10.17 apk in system/priv-app/OnePlusCamera with the filename OnePlusCamera.apk. You must give it permissions 0644 and reboot. Once back in Android, clear app storage before launch.