Diamond/shard shape with a little bit of particle system flavour. Instanced drawing of the particles is good but I'm not sure if it's faster to send the transform per instance or do the vertex transform work on the GPU. Either way, this one is done on the GPU because I hadn't done it that way before.

Random vertices on a disk and a sphere, joined to their closest relative, then interpolated between the two states, rotated.

Wrote some code for polyhedron subdivisions and wireframe geometry for webgl.

This was more trouble than I thought it would be because I really wanted the edges to interlace.

Shader-based generation of the terrain. Quick and dirty 3D noise + domain warping. Just for fun. Realtime is a little different each time. http://tannerrogalsky.com/demoloops/loop065/

A wireframe mesh transformed by 3D perlin noise. The realtime demo is a little different every time.