It's a lampshade that fits the IKEA Hemma hanging lamp. The FreeCAD model is fully customizable via the spreadsheet, so it can be modified to fit your aesthetics. However, the model breaks the FreeCAD mesher and the direct STL export creates a broken STL. So I exportet a STEP first and then used another CAD software to export the STL based on that.

I'm not 100% satisfied with the design yet, so a modified version may appear here soon.

Prints well in PLA but I'll be attempting a print in PET-G too. More info on that will be added here.