I'm wondering what's the best way to render the following scene :
I have a phonebooth in front of the camera with a street behind it.
Basically it's 4 layers : booth front glass - phone in the booth - booth rear glass - street behind the booth
How do I have the phone in focus in the middle and have other elements defocused accordingly, including ( and this is the tricky part ) the glass itself, as it has smudges, dirt, scratches, so all these imperfections need to be defocused but you need to be able to see the sharp phone behind them and the defocused street further behind.
Is this even an Arnold problem or somehow need to layer it and do it in nuke ?