Hi everyone i just had a quick question about a scene that im making. The tube in the center is supposed to be glass but its not revealing the inside of the tube. Ive played around with the IOR but nothings worked. I attached a picture of the scene with the glass and then the scene without the glass. the light coming from inside the tube doesnt seem to make it out of the tube when the lgass is there. THanks for your help!
How about excluding the glass from casting shadows?
Marc
Looks like it is refracting like a solid piece of glass, give it thickness and I think it will work.
Yeah, have you made actually a tube or a solid piece of glass? And I think all you need to do is use low refraction settings.
thanks for the replies, i modeled it in rhino so the glass is a tube with nothing inside. Marc: i tried the casting shadows option and it seemed to work to let the light out but it still doesnt reveal whats inside the glass very well. THanks again ill post another pic soon
Try using a standard material and a Vray material in the Reflection channel to fake it.
Yeah, have you made actually a tube or a solid piece of glass
Thats the point here I guess.
You need to tell vray that your tube is made with a thin piece of glass and not a 1 meter radius cylinder IOR 1.51. 
You can use ‘solidify’ (free modifier) to do so, it’s quick and easy.
mmmm … what you need to do is model the glass as it would be.
your glass is a solid, you need to model a hollow tube so the glass has a thickness, as it would be in real life.
example …
Nice render by the way
problem solved 
thanks for your help i just made a tube in max and replaced it.
give us an update..
I’ve also experienced quite a few weirdnesses when coming from
rhino. I assume you used the ‘tube’ function which should generate a
good model which is actually hollow inside, however when things go
awry with rhino models, I first check the normals. More often than not
rhino likes to pick arbitrary directions for stuff that seems perfectly
rational to you and me.
I am by far not a rhino expert, but… It I can get closer to what i want to
model in that program than max, so I use it. Not without pain and suffering
though!
Escher
heres an update
nice. but now the first image doesn´t show your problem anymore. 
take me a few minutes to realize that you replaced the first image with the final. :lol:
thats better