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V-Ray IBL HDR Compositing

Date: 08/25/2011 | Category: 3D

Compositing is a pretty universal technique that involves inserting a CG component into a real-world photo or video. One of the main issues when dealing with this type of effect is matching the lighting of the target scene, so it looks like this CG element is actually part of the shot. Other aspects like exposure, reflections & shadows also add the extra touch to truly integrate your model into the scene.

Image Based Lighting (IBL) is the process of deriving these elements from a real world HDR photo, which is analyzed and used to generate a full lighting solution in your CG software. In the examples below, I'm showing both indoor and outdoor examples of this technique using the Iron Man helmet from 2008 film.

Also, to further highlight the power of this effect, I've included another image without any lighting or compositing solutions, just a default light in the software. Here, you can really see how much the IBL technique is adding, and just how "off" the CG element can look without the proper lighting solution.

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V-Ray IBL HDR Compositing