Fir trees point upwards, silly
Dear videogames people,
The reason your fir trees look weird is that branches on fir trees don’t point downwards, you only think they do. They point upwards, without exception.
Exhibit A: The otherwise excellent Halo 3 assault/CTF/shotty snipers map, Valhalla. Witness the mutated fir trees in the right middle ground, and background. Presumably the result of some Banshee plasma leak, or something:
Exhibit B: Female Draenei from World of Warcraft dancing in front of similarly mutated conifers on the Azuremyst Isles west of Kalimdor (update: I’ve removed the direct link to the source of this image, but thank you to thallos.net for the supply of evidence!):
Exhibit C: An actual fir tree, with branches pointing upwards, not downwards:


