Big captive sphère
thingiverse
Big Ball in Cube: https://www.youtube.com/watch?v=8mQoCcWMSRQ&feature=youtu.be There are two ways to make it. 1 - One pass, see the attached file, I couldn't get it right with my printer, not good enough. 2 - In several steps, first split the sphere into two parts and then split the cage into two parts.
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