One of the Interesting feature that you will find in Google Pixel's Camera Software is the ability to use HDR+ Mode. HDR+ produces stunning photographs without the need to learn manual photography or edit RAW images.
Thanks to XDA developer B-S-G, who modified the Google Camera app from the Pixel with HDR+ mode and got it to work on any phone that uses a Snapdragon 820, 821, or 835 processor. This includes the Samsung Galaxy S8, Moto Z2 Force, Moto Z, LG G6, OnePlus 3/3T, OnePlus 5, and all the other Smartphones with similar processor.
You can download the Google Pixel's Ported Camera Application from the below link. XDA has verified the application and it doesn't contains any malicious code and whatsoever. Enjoy!
XDA | Direct Link