I'm trying to sweep a profile curve along a path curve, where the path curve (the one to which I'll apply the bevel) is a simple set of straight lines and right angles.
When I set the path curve's Bevel Object to the profile curve, I get roughly the desired result, except that the size of the profile curve gets bigger as it approaches the ends of the path. Why is that, and what do I do about it? (I tried setting a straight taper curve, but that doesn't help.)
Here's a simple blend file showing the problem: