Attached Link: http://www.poserdirect.com/sparkyworld/images/bigpix/10_dsu_large.jpg

..*and what can be achieved by doing this*..

Ultra cool results for starters :)

Like the posters above say theres a wide variety of ways of doing it, and theres a tutorial here..

http://www.cocs.com/poser/compositing.htm

..but theres no "correct" set way - it's what works for you personally.

My prefered approach is to use a range of different background props/figures which allow the user to add their own photos.  Sample here and at the link.

 

Pinky - you left the lens cap of your mind on again.