The same bad effect happens also to many newer custom Q3 arena maps unfortunately. Many are award winners and would be great to have but are unplayable under Morphos unfortunately. Hope the situation improves in the near future. We do have the capable hardware to run Doom 3 and we do also have capable coders so it's a pity not to being able to play it. Think it's a matter of free time or motivation. Perhaps we should return at the option of bounty..