Google posted on Twitter the other day that they have updated the help document for the Google My Business photos page. The content did change and I have a before and after for you below.
Honestly, nothing significantly stands out as different outside of that you need to have a verified business for your photos to show in the Google Local results. Also Google switched up some of the types of photos they allow and some other small things.
Am I missing anything big? Here is the before and after of the page, you can click to enlarge.
BEFORE:
AFTER:
Forum discussion at Twitter.