In this 3ds max tutorial we gonna be covering linear workflow and multi-pass compositing under mental ray renderer. There are multiple ways for creating bubble. One solution is Vray material but not everyone can afford over one thousand dollars third - party plugin and most important - Vray won't solve your problem with getting nice alpha channel in. So this is the best solution to recreate thin film interference phenomenon and be able to composit your bubble on top of any footage. We gonna be using open EXR image format to have more control over our compositing.