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3DPrinting
3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.
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I should have 3 different glow filaments somewhere, one PETG, two PLA. Typically I preferred the PLA versions - they had a bit more uniform glow. The PETG one had brighter spots, but as it was mostly transparent individual spots were more visible than with the PLA prints.
Ohhh that makes sense! The opaque material acts kind of like a diffuser?
I didn't do enough testing with different materials for a conclusive answer - but that was my guess as well.