Ambient Occlusion does not seem to function when enabling Forward Rendering. I tested the level without Forward Shading and could notice a visible difference in the shadows when Ambient Occlusion was enabled and when it was disabled. With Forward Rendering enabled there was no visible difference.


Tested in //UE4/Release-4.25 @ CL 14469661 and Ambient Occlusion does work with Forward Shading so marking as a Regression.

Steps to Reproduce
  1. In any project enable Forward Rendering 
  2. Restart the Editor
  3. Navigate to Edit > Project Settings
  4. Search for Ambient Occlusion
  5. Toggle it on and off while observing the lighting in the level


Ambient Occlusion has no effect on the lighting or shadows in the level


Ambient Occlusion would function when Forward Rendering is enabled

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ComponentUE - Graphics Features
Affects Versions4.26
Target Fix4.264.27
Fix Commit15284815
Release Commit15284815
CreatedFeb 24, 2021
ResolvedMar 10, 2021
UpdatedSep 19, 2021