Wheels, motion blur and motion vectors

[DickKickem]

@Kalle-H;728553

Old school technique with motion blur was to render scene multiple times with substeps to accumulate buffer. This is insanely costly but gives nice algorithm that can be used with modern techniques. For correct motion blur for wheels you would need to render spinning wheel multiple times during when shutter is open. So let say your 4ms shutter speed and you render same wheel 4 times in time T, T - 1ms, T - 2 ms and T - 3ms. Also can use alpha testing instead of blending. I think they are doing just like that in The Human Race.

That went waaaay over my head.

How do I get started with this solution?