Hi Marcus, the necessary changes are some code-exclusions in two Radiance -source files of the main distribution. Probably this has already been changed in the HEAD version (dunno...so far I haven't entered the Headshop). Anyway, I once posted the changes in an answer-mail some months ago: http://www.radiance-online.org/pipermail/radiance-general/2003-May/000702.html good luck -cb