Turns out it was just a typo! It's funny how all the "hard" logic I spent the past like 4 hours writing (in one go!) that interacts with the game systems worked, but the stuff that broke was simple stuff like forgetting to add a thing to a list or making a typo in a config file.

Inspired by Harrier Jump Jet the terrain subtly changes color based on slope and altitude to differentiate triangles. I've also added a subtle "polygonal floor" effect when you get near the ground which helps to give a sense of depth and speed when flying over the ground.

The lighting model used in the game suffers from the same problem that A-10 did (which is cool, but also bad) that when flying through terrain, it can be difficult to tell where one hill ended and another started. The ground scatters aren't enough for this.