What have I done wrong?

[Anim]

Good afternoon,

I'm new at in sketchup and v-ray. My previous visualisation after rendering were looking good. Now something like this happened and I don't know what it is, where it comes from or what have I done wrong. Do you have any ideas?

[juju]

A better (larger) version of the image file may be beneficial.

[boofredlay]

Moved topic to the V-Ray forum.

[Anim]

Is it better? I'm afraid that I can't do better, larger picture. I mean I can but it will take ages..
So.. what happened? As I said I'm new in sketchup and v-ray but it never happened to me before. Sofa, ceiling, walls, floor...