Steps to Reproduce

Follow the video attached[Link Removed]

  • New a default map, put a staticmesh as cover to generate some shadowing area
  • in World settings use ILC instead of VLM
  • Build lighting
  • Place a Movable mesh in viewport, move it around it lost ILC and become black

Lighting is correct while Simulating or playing the game, so it seems only a in editor viewport rendering issue

The issue happens both in PC and Mobile preview mode

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ComponentUE - Graphics Features
Affects Versions4.26.1
CreatedFeb 26, 2021
UpdatedOct 13, 2023