Description

The PreviousFrameSwitch material expression works as expected only with world position offset, but not tessellated displacement.

Found in 4.19 CL# 4033788, 4.20 CL# 4233996, 4.21 CL# 4302610

Steps to Reproduce
  1.  Open the attached project
  2. Press G

Results:
The patch with displacement does not blur properly with PreviousFrameSwitch

Expected:
Both patches will be blurred

Have Comments or More Details?

There's no existing public thread on this issue, so head over toAnswerHub just mention UE-63178 in the post.

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Unresolved
ComponentRendering
Affects Versions4.194.204.21
Target Fix4.26
CreatedAug 21, 2018
UpdatedFeb 27, 2020