I've been browsing at TWCenter about the problem and apprently there are also other people who seem to have the exact same problem I have with the RTW movie cam. I have 1.5 RTW and BI 1.6 of course (otherwise FE won't work) and there are people over there are saying that they can't render if the game is patched.

They were saying something about preferences.txt? Maybe it doesn't work with my settings (1024, 1.33, 1)? Anyone here who can render successfully? What TGA settings in preferences.txt should I put in order for it to work?