You can make those with Blender easily. Using Blender to design a small object to send to a 3D printer is like using a bulldozer to build a sand castle. You can do it, but it’s overkill.
If you’d rather twist in CAD, we can help. If you really want artsy 3D printing, you probably need to learn Blender.
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback