I recently started using shapeways using the pedant creator app. Everytime I upload my 2D design that I made in Illustrator and exported as .png it says "Walls in your design need to be thick enough to support weight, withstand cleaning, polishing (depending on the finish chosen), sorting, and shipping." When I fix it by clicking on "fix thin walls" it ruins the design at the pointy ends of the cresent moon. I added some screenshots where you can check it out. Can someone tell me how to fix this without getting the design ruined?