I'm trying to figure out how the photo rendering actually works.
As I mentioned in this post - http://www.sweethome3d.com/support/foru ... t,10#27474 - the first two pictures in that post took a little over 6 hours and 5 hours to render, and that particular sh3d file is about 70 MB, while the following two pictures, taken from a sh3d file that is about 135 MB took considerably less time.

This one took 22 minutes.



This one took 25 minutes.



Any ideas/advice as to why the major difference in rendering time?