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This sea urchin light makes any room look amazing! To-date I have 3D printed 5 of these for use in my home, replacing standard glass ball ceiling light covers.
A real sea urchin shell was 3D scanned to create this light cover, and the size limited to comfortably fit on a Prusa MK3 3D printer or similar. Depending on the material you print with, you can get different lighting effects (see photos comparing several materials/finishes). Personally, I found that using a Natural PLA (translucent) and lightly spraying the outside with white spray paint provided the best effect; Natural on its own was difficult to see the textures of the shell, although it provided the greatest illumination, while solid white PLA provided a fantastic shadow pattern when the light was on, but was not bright enough to illuminate a room. So, depending what your needs are (illumination vs. decoration), you can choose the appropriate effect.
If you want to use the Sea Urchin Light on a different light fitting, e.g. a lamp, just scale the model to suit your needs.
For a single download fee, you can 3D print as many of these out as you like for your personal use.
Read exactly how this was designed and tested on my blog https://edditiveblog.wordpress.com/2020/03/14/3d-printed-sea-urchin-light/