sir Thomthom,
thank you very much for this plugin.
what a coincidence! This day I've been thinking of raytracing and what is its concept. I think I'll understand this once I use your plugin and of course read some notes about it.

hello to all
I am a new member.

remus is right. graphic card may be the source of your problem.
under the OpenGl on preferences, untick "use hardware acceleraion"

Is sketchup 7 strict about 32bit or 64bit operating systems? I think some applications does not run on 64bit OS on windows vista. So, some applications are made to run on 64bit OS.
hehe