System Information
Operating system: Microsoft Windows 10 Pro
Graphics card: Nvidia GeForce GTX 1050
Processor: Intel(R) Core(TM) i5-2500 CPU @ 3.30GHz, 3301 Mhz, 4 Core(s), 4 Logical Processor(s)
Blender Version
Broken: blender-2.91.0-2c317457cbf2-windows64
Worked: New in 2.90, didn't work in older builds of 2.90
Short description of error
When there is very high camera motion blur in EEVEE, a step value greater than 1 introduces noticeable steps which don't get properly blended. There is some post-process blur but not enough to fill the gaps. Changing Max Blur or Background Separation doesn't help.
Exact steps for others to reproduce the error
Start with default blend file
Go to frame 1 and rotate the camera so the default cube is at the left of the screen
Add a keyframe (of rotation)
Go to frame 5 and rotate the camera so the default cube is at the right of the screen
Add another rotation keyframe
Turn on motion blur with steps set to 4
Render a still image at frame 3
Notice stepping artifacts not being blended properly by the post-process motion blur.
