Waiting for Poser 2016 PBR (physically based rendering engine)

I submit to you this puzzle.

I have never been able to do a decent rendering in these conditions.

If i don't learn to light this scene i'll go away from Poser.

This scene has inspired my post (https://www.renderosity.com/mod/forumpro/?thread_id=2894079&page_number=2), unfortunately still groping in the dark.

I know that this type of scene is the worst to work with.

Surely among you there is more than one person who can do it well, these are the limits that you have to respect.

1 - Gamma Correction ON 2.2 2 - IDL (and / or the IBL if to give best result) 3 - None direct light sun in the room, sun is over the roof 4 - Only Poser Render Engine (yes firefly), external render engine are accepted only for demonstration 5 - No lights on the wall or roof (light bulbs to be clear) 6 - V4 skin must result on real final rendering (no burn etc) 7 - Do not change wall / floor / roof material color 8 - day External city skycrapers landscape visible outside

Here you can download the scene, everythings are obj, so there is no copywrite problem. DOWNLOAD_SCENE

Victoria 4.2 you must have high resolution and his skin You must have BB sphere

These things are in the scene, nothing else.

i think that i'm not the only one who want to learn how do these type of scene.

Thanks to everyone that will contribute.

PS i hope i'm not violating something on the TOS

Poser Pro 2014 SR 1 on Windows 7 64 bit
I use IDL, Gamma Correction and EZSkin for all final renders.