Answer 1

I had the same question for a long time. It resums only to duplicate a div multiple times so it overlaps, rotate on x or y axes and that's it - a cube, a parallelepiped or a cilinder. Other geometric bodies like a sphere can't be created. Just think what you can do with multiplication and try it. I know only A-Frame, a js library, where on web you can make 3D objects, but it's only for VR. You can try this also.