a room, a police car and 3 dice

Hi Jamis,

I just wanted to drop by and say this was a fantastic book! Thank you so much for putting it together. I truly hope you'll continue to publish more books in the same style.

I added multi-threading to get a 2x-4x performance boost, a job scheduler to render multiple images in parallel and support for OBJ materials.

For loading and rendering low poly OBJ files, I found Kenney's public domain assets very convenient: kenney.nl/assets?q=3d.

Cheers!