I really wish I could help, Dekker...
However, there is a Wiki on the POV-Ray site. After a bit of browsing, I did get a few leads on 3DS Max. As both programs are imaginably fairly widespread, I'd be shocked if there wasn't a Max plug-in to export .pov files.

And no... I've never heard of .udo before. I did look at Moray after you mentioned it, and it seemed like a pretty old piece of software. At least by your description it's pretty easy to use!
Finally, bringing the subject of renderer back up again has inspired me to make a better rendition of one of my favorite "old gals":
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