Some Blu-ray 3D disks have both the 2D and 3D movies on the same disk. If you make an iso from this disk, how do you access either the 3D or the 2D parts, is it by selecting the right title number from the pop up menu?
MediaPortal doesn't support 3D Blu-rays (yet). Your only option is to let Moving Pictures mount the iso and launch an external player that supports 3D Blu-ray. Usually you'll be able to select 2D or 3D in the disc's root menu screen.