Rendering glass for live action integration

[R_Cyph]

Vlado,

I've got a quick question. I've trying to rendering a helicopter cockpit ( glass) to composite over live action footage. I want the inside of cockpit to be visible through the glass but I also want the plate visible in the background. can you tell me how to get the background plate to refract/distort in the glass without it actually have it visible in the render? Thanks!

[Svetlozar Draganov]

You can achieve this effect by using Vray Environment Override and place the desired texture or color in the "Refraction texture" slot. Vray will render an empty background - except when you have a background behind a refractive object - then Vray will use the specified texture/color.
You can get similar result by using Dome Light with assigned texture with activated "invisible to camera" option.