3d Rendering Engine

After using Unity 3d, I started to wonder how the 3d rendering worked. I did some research and this was the result. There are a few limitations such as intersecting triangles don't properly render. The framerate is really low because it doesn't fully utilize the gpu. And there is no textures. Even with those limitations, it was a great learning project.

See it here:

https://www.khanacademy.org/computer-programming/3d-engine-terrain/4743298352627712