Question: what is the difference between imax 2d and reald 3d?
Answer: The glasses for IMAX Digital 3D are larger to accommodate for the larger screens while the RealD 3D are just the standard size of 3D glasses. The audio in the IMAX 3D is uncompressed and therefore seems to be of a better quality as opposed to RealD 3D whose specifications on sound are not standard but vary by theatre.