Invisible object is behind transparent object ?

[ghost]

Hello.
I have two 3d object.
One of them is transparent and is called A(a glass). The other is called B.
Normally, we can see B when B is behind A.
But I want to invisible any part of B if B is behind A.
So can you give me any advice ?
Thank you.

[romainguy]

You could give your object a transparent material (but draw it opaque) and give it a lower priority so it's drawn after the other transparent objects. That will work as long as the other transparent objects write to the depth buffer.

[ghost]

Thanks for your comment. I will try it.