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?

• Maybe if you set the origin on the second curve to be at the bottom point of it. – Tibi Nov 5 '15 at 13:56
• I've found that if you make the 1st curve a rectangle (not rounded) then the artifacts disappear. But to have a slightly rounded rectangle, I have no solution. – Tibi Nov 5 '15 at 20:30
• The segments of the curve at the corners are too close to each other. If you convert that to mesh you'll see that in more details (curve segment deleted). I can think of only moving them slightly out from the corner. You could do that after converting to mesh and using Bridge Edge Loops to connect them with precise. – Mr Zak Nov 5 '15 at 20:34
• blender.stackexchange.com/help/someone-answers – Samoth May 30 '16 at 8:54