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Eevee Motion Blur Bug (Mess with Background)
Open, Needs Triage by DeveloperPublic


System Information
Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: AMD Radeon HD 6670 ATI Technologies Inc. 4.5.13399 Core Profile Context 15.201.1151.1008

Blender Version
Broken: version: 2.81 (sub 4), branch: master, commit date: 2019-09-02 15:37, hash: rB283d96de1170

Short description of error
With Eevee, motion blur appears only over other objects, but never over the background. It seems like an internal compositing bug.

Exact steps for others to reproduce the error

  1. Make two objects with different materials overlapping each other in the camera view.
  2. Animate the camera forward-backward.
  3. Enable motion blur in Eevee and look at rendered viewport or image.

I made these steps in the attached file:


With Eevee (Also weird effect near frame borders):

With Cycles everything is fine: