Thanks Emmanuel. Will try with more cores, and keep the forum posted of the progress.

First things first: Hats off to the developer and all co-developers/ contributors for making SH3D such an amazing piece of software!

I have been trying to fasten the speed at which photo-realistic images are created - here are the details:
SH3D Room size: 110 MB
# of lights in room: 2
CPU: Intel ...