FPS Drop Between Ue4 and Ue5

Development Rendering
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If you want to match the performance of UE4 in UE5 you’ll need to change a couple of settings to rollback the new (and more costly) rendering techniques.

Under Project Settings -> Rendering change the following:

  • Dynamic Global Illumination Method: None (instead of Lumen)
  • Reflection Method: Screen Space (instead of Lumen)
  • Shadow Map Method: Shadow Maps (instead of Virtual Shadow Maps (Beta))
  • Temporal Upsampling: Off
  • Temporal Super Resolution: Off

Under [/Script/Engine.RendererSettings] in DefaultEngine.ini add the following:

  • r.Nanite=False

With these changes the rendering and performance in UE5 should match what you would expect from UE4.

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