Trisquel
Description
Trisquel celtic symbol with number 23 and CGS on both sides.
Instructions
I designed this in Sketchup (sorry..) as a request from a friend. If someone knows how to create the same shape with OpenScad directly from an image, I would like to learn how to do that :)
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License

Easiest way to do that is to use Inkscape to make a DXF of the outline of the symbol, and then OpenSCAD has a "extrude_dxf()" function and you tell it how many mm to extrude by, and then you're good to go.
Cool, i had seen that function but never used DXF files. I will give it a try, thanks!