http://www.androidpolice.com/2016/10/18/google-explains-software-makes-pixels-camera-impressive/
Neato.
Cheers,
Scott.
Levoy says that HDR+ should be left on at all times, and, "[he] can't think of any reason to switch it off." That's probably because one of the main demerits of traditional HDR+ is slowness; for instance, with the Nexus 6P and 5X, you'd get a few-second delay. However, the Pixel's HDR+ is instant, and here's Levoy's explanation:"The moment you press the shutter it's not actually taking a shot — it already took the shot. It took lots of shots! What happens when you press the shutter button is it just marks the time when you pressed it, uses the images it's already captured, and combines them together."
Neato.
Cheers,
Scott.