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I saw this interesting desktop toy that is both a square and circle when you spin it. The splines are segments from a parabola y = x ^ 2

The same thing goes for us developers as well. We are moving away from developing something that is understandable from a code/math perspective and instead are now just feeding in parameters to a black box and blindly using what ever pops out the other end, without gaining any insights or knowledge about how the results came to be. Almost feels like a dumbing down of science. A bit like just going to Wikipedia and trusting the answer is correct with no references or info how that answer came to be. Off topic but in another crazy use of AI... this company used an AI to scan users behaviour on their networks and anyone who wasn't blinding typing rubbish, sending un-required emails or creating meaningless Jira tickets was deemed "unengaged and unproductive employees" and then fired. https://www.gamasutra.com/view/news/386534/Xsolla_lays_off_150_after_an_algorithm_ruled_staff_unengaged_and_unproductive.php

I finally got around to figuring this out on my own and thought I would upload the solution just in case someone else struggled doing the same thing. I hope it helps others. As I suspected, its simple once you figure out what is necessary. Emissive Box Sign Solution.7z

tricky, maybe use a enviroment object to lighten everything and a light with shadow caster activated? But I am not shure if this would do it.

Here I put a null in the BMW body that points to a target on the spline that is ahead of the car. You can read the local H rot of the pointing null to get the wheel parent local H. car path xpresso rotation_0001.c4d

Yes ranting is ok but may be done in off topic area. Users should focus on art instead. This c4dcore ex c4dcafe has good moderation but also good folks imho.