[Source] The Foundry

Alex Fry from Dr. D Studios demonstrates how they used NUKE and OCULA on full CG and live action shots in Happy Feet Two.

Dr. D Studios used NUKE for all of the sky processing in the movie. This was done by taking HDR time-lapse stills from an array of 5D cameras to build all the sky domes, all of which was heavily automated using NUKE. Alex also shows how OCULA was used on live action shots in Happy Feet Two.