requirements to the content

Hello everybody. I’m a marketer and on our website, we plan to use your plugin> It will be a 3dtour in a shopping mall with 2 floors and 15 rooms.
What. are your recommendations/requirements to the content – cause I completely don’t understand what shall I say to out photographers who will make these photos?
Like size, format, proportions etc.

Would appreciate any piece of advice on this issue

Thanks