Hmmm, I think the first is really rad, nice work with the C4Ds. As first try I am so impressed with the outcomes, they are pretty (of course except from the fact that the second one contain a guy who looks like a girl xD and that it's swallowed up) Anyway, really good work, Tim! try to look for C4Ds' tutorials they'll help you understand the way they are used better even if they are for Photoshop and not GIMP they'd still help, all you need to know is the standards then you can go skitching on your own.