Example demonstrating pixel reprojection from a previous frame using velocity buffers.

Demo here

• Fix velocity buffer in motion blur pass
• Fix discarded depth when zooming in
• Adjust depth comparison epsilon based on distance to camera -- changes "thickness" of depth buffer
• Add jitter
• use multiple samples
• See Insides [TRAA](https://github.com/playdeadgames/temporal/blob/master/Assets/Shaders/TemporalReprojection.shader example)
• Add accumulated data over multiple frames
• Make depth grab more precise to avoid pixels at edges of models getting data from behind.