Very much work-in-progress. This is going to take a while. Besides export being tedious by itself, I keep finding many things elsewhere in the codebase that need to be changed or fixed for something like this to work at all.

Editor: changed outliner to use FancySelect for nicer styling (using custom DOM instead of <select> element).

Work-in-progress, still some weirdness occurring.

Realised that DirectionalLight is "poluting" the scene graph...