Glad it worked.

Rendo is quite slow for me ATM. Maybe they are working on the servers ?

Anyway, here again V4 default with EZSkin. FAST render settings + EZSkin.

Again the GOOD PREVIEW-NO IDL light set, but I converted the SUN from INFINITE into a POINT light that I could move inside the building.

Strenght = 100, Shadow = 1.0, Blur = 1,4, Attenuation = constant.

The "white" IBL stayed the same. No other lights.