More customization for tangent frames/up vectors This is useful for stuff like loops. 1. Default Up Vector (0,0,1) -> twisting artifacts: https://files.facepunch.com/lolleko/2025/January/09_17-52-OrangeredCowrie.png 2. Automatic up vectors using rotation minimizing frames (RMF) https://files.facepunch.com/lolleko/2025/January/09_17-53-DesertedClam.png 3. Manual up vectors/frames: https://files.facepunch.com/lolleko/2025/January/09_17-52-MisguidedWryneck.png