Reflection Optimizations

I've refactored how high quality reflections work, it's running on its own pass now and it should be 4-6x faster while looking much better.

Rendering artefacts are also gone and it still has the nice roughness granularity you'd expect.

You can modify the reflection shader and even specify your own if you want to experiment with new ways to render reflections or to composite over it, it's exposed as a parameter in MODES

This paradigm could be expanded in the future for players to expand their own render passes in the render pipeline without dealing with much fluff, let's see..