Posted on 2014-02-23
One of the biggest summer blockbuster movies of 2012 was Marvel’s The Avengers, produced by Marvel Studios and distributed by Walt Disney Studios Motion Pictures.
For the movie’s big battle scene, Industrial, Light and Magic (ILM), headed by visual effects supervisor Jeff White, recreated a digital New York City (about ten city blocks by about four blocks) using 250,000 still images, green screens and sound stages in New Mexico and Cleveland.
To rebuild the streets, ILM sent a team into New York to photograph the city. “It was the ultimate culmination of building on the virtual background technology (at ILM),” says White. “We started with the biggest photography shoot I know we have done here, which was 8 weeks with four photographers out in the streets of New York.” The team shot some 1800 x 360 degree Pano-spheres of NY, using the Canon 1D with a 50mm lens – tiled, and as an HDR bracketed set.
The ILM team worked their way down the streets at street level – shooting every 100 feet down the road, and then started again doing the same street via a man lift at a height of 120 ft, then they would move to shoot every building roof top. But given how long it takes to do a bracketed tiled set of images, especially in sometimes high wind, it was not as simple as just moving down a street. By the time the team would get to the end of the street it would have taken so long that the sun would have completely shifted, thus making one end of the street lit from morning sun, but the end of the same street lit from the opposite side by afternoon light. To allow for this the team had to zig zag across New York, and try to capture most of the streets from the roughly same time of day, but on different days. Even this was greatly complicated by changing weather. Once all the images were captured, tiled and combined, another team set to removing (painting out) all the ground level people, cars and objects. Then a third team would re-populate the streets with digital assets ready to be seen in perspective or perhaps blown up. ILM came up with complex algorithmic traffic scripts to populate streets and create the sort of traffic grid lock any real world incident like this would naturally cause.
- quote from VFX Guide article by Mike Seymour
The Clauss RODEON VR panohead was used to capture and create 1800 x 360 degree pano-spheres. The image below (captured from the video above at 1:10 mark) shows the Clauss RODEON VR and a laptop running RODEONpreview.