How to get rid of artifacts in corners - Bevel Object I am trying to model a swimming pool. I create a rectangular loop (first curve) and a wall profile (second curve). I used the second curve as Bevel Object on the first curve, but it creates strange artifacts in the corners.

Could anyone tell me how I can fix it?
Moving your Bezier Curve's origin (that you use as your Bevel Object) to the "outside" of your Curve will solve your problem:


Your Origin is now "in the middle of" your Bezier Curve so that your Bevel Object can't be moved along your rectangular path without these artifacts.