In one example, a device for processing media content includes a memory configured to store media content; and one or more processors implemented in circuitry and configured to process a first packed region of the media content, wherein to process the first packed region, the one or more processors are configured to unpack the first packed region to produce a first unpacked region, and form a first projected region from the first unpacked region; and process a second packed region of the media content, the second packed region overlapping the first packed region at least in part, wherein to process the second packed region, the one or more processors are configured to unpack the second packed region to produce a second unpacked region, and form a second projected region from the second unpacked region.