IBL = Image Based Lighting

It's available in Poser 6 and avove.

Here are some tutorials on it:

Olivier's Making of a pomo pic
Castle Poser Tutorials
Poser 6 IBL Ins and outs by Olivier
A little tutorial about lighting by Olivier
Tutorial: GEL MAPS by Olivier
How Light Probes are Laid Out
Advanced Image Based Lighting in Poser 6
Basic OpenGL Lighting
RDNA Poser 6 Resources
Using Python to Delete All Lights

Here is a thread that has a ton more links to all things lighting :)

http://market.renderosity.com/mod/forumpro/showthread.php?thread_id=2662390

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi