I was doing some tests to illuminate a room, and I have seen this problem with shadows

The only light in the sun (150%)

Sky outside is a dome but not visible in raytracing and no light emitter.

I checked all the materials in the room, but I did not find anything strange.

Do you recommend?

Thank you.

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