this a shape file using with Adobe Photoshop you have to load it from photoshop's shape option section heres how to load it:
go to the rectangular tools, click it for awhile until another small option bar come out and select custom shape tools, then you can load it: see figure below
I've learn my lesson, because of unsuitable render setting. a picture that can be render in about a couple of hour could consume an entire 4 days on my poor old pc.
New to Vray for Sketchup? some basic guide book that will help those who want to learn more and start produce your own photo-realistic rendering by using sketch-up.Here are the link. So don't waste your time start producing your first photo-realistic image now!
some of the try using DOF( depth of field ) something tells me that using DOF for interior rendering is not advisable because it make other part of the rendering not focused