I did not take pictures, regrettably.
I can give you my impression of the corruption though.
Dark I - Orange eyes. No really, that's it.
Dark II & III - Increasing amount of dark veins. This looks really well designed during the cutscenes, but during the game graphics (even on High), it looks like their face is simply dirty... I'm not a fan.
Dark IV and V - More veins, plus glowing red eyes. The eyes look absolutely fantastic and even seem to have a slight glow-in-the-dark portion to them. The veins at this point however, become too "dirty" for me to enjoy the sith corruption option anymore.
I turned corruption off with Dark IV, personally. Not an easy decision, because I really loved the red eyes. However, the dirty face thing was just too annoying to me.