Hi There, I´m using IBL Light in a poser project in wich a woman face (V4-Lorelei) is in zoom... but when i reder it (firefly) strange shadows appear in her face (the shadows seems fractured)... does anyone knows what can i do to make this shadows look better ??

From my limited knowledge of lighting, sounds like you have polygons casting shadows on themselves..which.. from memory means the min bias on the light that is casting the shadow would need to be increased in the lights property settings.

Or perhaps you have shadow enabled for the IBL light? If so, turn it off.

OK, I'll be the first to say it .... post a picture of what is happening. to the render.
A picture really helps. "Fractured shadows" to you may look like something else to others.

thanks, i'll post the screenshot as soon as possible...

Hello Surgeon3d:

I have recently begun to employ IBL in Poser 7 (8 core Intel/Mac) and have encountered the same apparent under eye artefact that you described.  I must add, that turning off "shadow" does not seem to rectify the problem and I wonder if you have found a solution?

Thank you in advance.

I really suggest doing these series of tutorials. IMHO Olivier is the guru of Poser Lighting.  I learned lots from him and still go and post my results from time to time to get his opinion. Sometimes I get it right, most times not, but I'm learning, hehe

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

This image he did with Gel Maps is amazing!

http://www.runtimedna.com/mod/forum/photos/Message187432.jpg

That is posted in the tutorial for Gel Maps thread here:

http://www.runtimedna.com/mod/forum/messages.php?ShowMessage=187407

Are you using Ambient Occlusion in the IBL. That might cause your problem. Have you got a picture of these atrifacts under the eye?

Hello:
Thank you, Acadia, for the links.
As for ambient occlusion, I believe that it is turned off but I will surely look into it.  At this very moment, I am on a PC, whereas, Poser 7 and all other associated software are on my Mac.  I will, however, post a jpg image depicting the described artefacts.
Thank you.

Well, you were correct! 

IBL Ambient occlusion was enabled and turning it off seems to have resolved the under-eye artefact issue.
Thanks again.

I have exactly the same problem. However,  I do not want to turn off AO. (from looking at the Poser demos and lighting set, this seems to be the norm) Are there any other ways of removing these peculiar artifacts ?

Off the top of my head: yes, it can be done.

Ambient occlusion is often applied to the light. This is the fastest way to set up ambient occlusion, but not the best way.
It's better to turn ambient occlusion OFF for the light, and turn it ON per material of your scene. You can specify different ambient occlusion settings per material. In the case of those under eye artifacts, ambient occlusion on the face material could be turned off, or set to a larger bias, or set to use more ray samples, or set to use a different angle (lots of experiments, lots of test renders... time consuming, that's for sure!).

The area render is your best friend ;)

It's a question of trial and error.

Btw, setting AO for each material will give you much better results as the AO doesn't have to be the same for the face and the lips for instance ^^