11
votes
1answer
376 views

How to draw a circular, inclined road in 3D?

I want to draw the road which is similar to the following (but please ignore grass, soil, and the surrounding scenery for the sake of simplicity), to illustrate a physics problem about circular ...
39
votes
5answers
3k views

3D helix torus with hidden lines

How can I generate the above image using TikZ (possibly other methods will work if they produce better looking results)? I would like to have a nicely shaded (not so dark image) without gridlines ...