@theluthier Thank you! Very helpfull. A made a little update on the car. Strange I couldn’t get this setup working earlier, because I did something kind of like this before, but I didn’t have a clue of what I was doing. It’s starting to come to me a tiny little bit now. The following render is nowhere near finished but I gotta stop now, ’cause I got to start working on the new assignment. Here’s a current render, and the node setup:

Let me know what you think of it.
BTW: Did you know the audio of the ‘Week 6 live stream’ of the ‘Modeling a realistic character’- course is severely out of sync? Something like more then 15 seconds, or so. Don’t know exactly. It’s a bit hard to follow like this.