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This is a 3D printed neon sign shell designed as the swamp symbol for MTG. Check my profile for the other Magic the Gathering symbols as neon signs as well!
For build instructions and a compatible parts list, see this 3D Printed Neon Sign Tutorial. There is also a video for how to create your own custom 3D printed light shells using Fusion 360!
I recommend printing this in PETG as the flexibility and heat resistance will help. But I have included a PLA profile as well.
Both the PLA profile and the PETG profile have 5 walls. I like using more walls, but I know a lot of folks don't. So I have also included a profile for each material that only uses 2 walls and named them ‘FAST’.