Fixed Foveated VR Rendering

While Citizens have the vision of an apex predator, unfortunately our monkey eyes can't match them.

Foveated rendering is an optimization technique to adapt render quality to human peripheral vision, but it's usually very stark and noticeable since it traditionally goes in power of two increments with an obvious pattern.

I've wanted to implement it using a different take that closer matches the granularity of our optics to make it unnoticeable while heaping the advantages of it.

You'll get better performance on VR for what's essentially free, I want to give another performance pass on VR soon, but let's focus on flat screens first for the next month.