Thanks everyone. I don't know what the problem was, but I restarted Sketchup and it worked fine after that. So thanks again for all the kind help.

@Thomthom; No problem, I know I was asking for alot. And without trying to come off as too rude, would you mind sharing your vray settings for the floorplan? Mine turns out either too bright or too dark, but that might be the problem of the floor plan itself. It's rather large (office building) and I'm not working with any extra light besides the Vray sun and GI. Would you recommend adding extra (a.i.) lighting?

EDIT: Just watched the video, I guess that answered all my questions, thanks!

@thomthom said:

@insomnia said:

@thomthom said:

Place a face at the top of the model - where the ceiling should be. Make the normal point into the room and apply a solid material to the side visible from the inside. Then on the other side, the one facing the camera - apply a transparent material.

That's what I did for these renders: http://forums.sketchucation.com/viewtopic.php?f=81&t=22423&p=189584#p188781

Thanks for the info. Your renders look amazing. However I can't seem to get it to work (but I'm fairly new to Sketchup and Vray). Everytime I apply the transparent material to one side of the face (ceiling), the entire ceiling becomes transparent. Do you have any tips on how to fix this?

Apply a solid material to the other side.

Thanks, for some reason it's still not working properly. Would it be too much to ask for the file of that small room that you've made where you've did this? Thanks in advance.

@thomthom said:

Place a face at the top of the model - where the ceiling should be. Make the normal point into the room and apply a solid material to the side visible from the inside. Then on the other side, the one facing the camera - apply a transparent material.

That's what I did for these renders: http://forums.sketchucation.com/viewtopic.php?f=81&t=22423&p=189584#p188781

Thanks for the info. Your renders look amazing. However I can't seem to get it to work (but I'm fairly new to Sketchup and Vray). Everytime I apply the transparent material to one side of the face (ceiling), the entire ceiling becomes transparent. Do you have any tips on how to fix this?