Odd Crystal

I haven't found time for any massive engineering projects lately but now and again I still mess around in 3d.

Shows a technique for making crystal shapes in OpenSCAD, a technique for getting polygon normals in OpenSCAD, hopefully useful to somebody.

The two images that refuse to show are politely sized anigifs:

https://thingiverse-production-new.s3.amazonaws.com/assets/f1/ab/05/f4/d0/xtal2.gif
https://thingiverse-production-new.s3.amazonaws.com/assets/63/b8/2f/1d/3d/xtal1.gif