Scenes of any size can be attached to a ticket, head to support.chaos.com, "Submit a Request" is up at the top, and you can attach files then. Please also include info on OS, OS version, C4D version, and Corona version (full version, not "latest version" as that can be unclear which version you think is the latest :) ) when submitting the ticket. It might also be good to know how much RAM you have, and how much RAM the scene is taking up at render time. Thanks!