Description

With Forward Shading, MSAA and Accurate Velocities from Vertex Deformation enabled  the viewport breaks. If any of these settings are different, the viewport is fine again.

Found in 4.23 CL# 8386587 and 4.24 CL# 8569829

Steps to Reproduce
  1. Open the Editor
  2. Enable Forward Shading
  3. Set Anti-aliasing to MSAA
  4. Enable Accurate Velocities from Vertex Deformation
  5. Restart the editor

Steps with attached project:

  1. Open attached project
  2. Move around in the viewport

Results:
The viewport renders like the attached image

Expected:
The viewport would be normal

Have Comments or More Details?

There's no existing public thread on this issue, so head over toAnswerHub just mention UE-80337 in the post.

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Unresolved
ComponentRendering
Affects Versions4.234.24
Target Fix4.25
CreatedSep 13, 2019
UpdatedOct 28, 2019