thanks for all the advice - I'm trying it now. I get myself into a robble with these things because it doesn't seem to be any intuitive logic behind any of these settings. I don't really understand why I'm altering any of them; I'm just doing so because my uni tutor did similar. =\ If you can post the scene or email it to me, I'll take a look. Better than taking shots in the dark. I'd have to email the file to you GecT, the size limit on the forum is way too low. It would be helpful though Thanks