If you go on to the Empire magazine site and then go on to the Superman Returns trailers somewhere in there is a link to explain how they transfered the 2D version of that film into 3D. They have also transfered the widescreen image into Imax which is basically a giant 4:3 image. So now they have an Imax 3D version of Superman Returns. How they transfered a widescreen image into effectivley a 4:3 image is not explained. Hope this helps.