Sceda, like Sced, requires a patched PoVRay in order that PoVRay will accept the transform matrices that are used to manipulate the Sced/Sceda objects.
This patch, along with already patched PoVRay source, is available. Both of these files are also available on Sceda's anonymous ftp area ftp://ftp.cyberus.ca/pub/sceda, and they're on Sced's ftp site ftp://ftp.cs.su.oz.au/stephen/sced too.