I had to resurrect parts of old code (keeping track of scene graph changes).
Good news: performance is great, new scene graph gains compound with buffers optimizations and non-array materials refactoring. Together we gained about 15% for rotating cubes performance test (pushing max to 2650 cubes at 60 fps).
Still broken with new scene graph: lod, skinning, collisions, AnaglyphWebGLRenderer, ParallaxBarrierWebGLRenderer, multi-canvas circle example.
Found out that CrosseyedWebGLRenderer probably wouldn't work for target-less cameras.
Something weird going on with `webgl_scene_test.html` and `webgl_scene_test_blender.html`. For some reason cubes dissapear.
* Realised that canvas.context has a createPattern method which allows CanvasRenderer to support tiled textures \o/ (Examples where there is a CanvasRenderer and a WebGLRenderer at the same time may get errors because CanvasRenderer now uses texture.needsUpdate too).