Hi,

The shape you have described is quite difficult to draw using Capture's built-in shapes, if not impossible. I think this is one of the cases where the Solo Edition doesn't get you all the way. The only workaround'ish thing I could think of is actually using a regular square shape but apply a material with the shape of the spandex in white on a black background and apply that as a material.

Here is a pict

That's rather brilliant actually!