Hi this is my first time using Vray and i'm chased by deadline for my final assignment . I encountered many problem with vray for sketchup (i'm using version 7.0) and any help would be appreciated. Here's my question :

1. I already paint a glass with default translucent material from sketchup (both face, front and backward) and make sure there is no plane behind the glass, but why each time after i render, the glass look solid and not transparent at all. Any idea?
2. My building color is almost all white, i want to ask how to make the final rendering have a little noise in it?
3. Where i can download good VISOPT option for exterior rendering?

Thank you very much!