stabby

Sort SOP: Point Sort->By Vertex Order
is what I normally use for curves.

You need to change your noise domain to ‘flow’ along the curve.
I've added a rest attribute to the circle to get the x,y coords, and added a ‘u’ attribute along the curve for the z coord.

EDIT: The second .hip might be a bit more intuitive…

aah i forgot you posted two examples

Here's a quick and nasty version that builds it using points, then replaces the points with a square face. The middle ‘Number Range’ parameter on the foreach1 SOP controls the depth… I haven't dared turn it past four.

The way I've done it here creates points for hidden faces, then removes them. I'm absolutely certain there's a way to algorithmically determine which faces are visible, but it takes too much thinking