The Niagara viewport does not adjust exposure when using the Auto setting for exposure. This is especially pronounced when using physically based values for skylight intensity. 

Steps to Reproduce
  1. Open a Niagara emitter or system
  2. Open Window>Preview Scene Settings
  3. Adjust the Sky Light Intensity in the lighting settings


The preview viewport will not adjust its exposure to compensate for the brighter scene. Compare this to the material editor, which will compensate for the change in brightness.

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There's no existing public thread on this issue, so head over toAnswerHub just mention UE-88536 in the post.

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ComponentRendering - Niagara
Affects Versions4.24
CreatedFeb 11, 2020
UpdatedFeb 12, 2020