Unreal Engine 4.23 Released!

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If you have a weird motion blur/smear when moving camera in PIE after updating to 4.23, uncheck the Generate Mesh Distance Fields in the projects settings, restart, check it again, restart.
This has fixed it in my case. Just leaving the info here for anyone having the same problem.

UPDATE: It fixes it only temporarily :frowning: As soon as I open any map that uses distance fields, the issue is back.
I’ll try to reproduce this in a new project. **There is a weird motion blur/smear when moving camera, but only in PIE or Standalone play mode. In editor (without the game running) everything looks correctly.

Update 2:** I’m not sure if this is related to distance fields at all, maybe the issue lies somewhere else. I’m still trying to reproduce that in a new project.

Update 3: I’ve found the bug! The issue is related to the Scene Capture Component 2D! When there is a blueprint actor in a scene with it, and a render target with 2048 or 4096 res, it corrupts the rendering after hitting Play! There is a very visible smearing/blur when moving camera. “Capture Every Frame” is disabled. This was not happening in 4.22. I’ll reproduce this now in a new project and submit a bug report.

Update 4: I’ve reported the bug. For anyone interested, here are the repro steps:

  1. Add a blueprint actor with Scene Capture Component 2D into any scene
  2. Create a render target asset with 4094x4096 resolution (can also be 2048, but the issue is more visible with larger res)
  3. In the Scene Capture Component 2D, assign the render target to the Texture Target field
  4. Move camera in the viewport, there is no smearing. Now Play in editor and do the same (e.g. look at objects like the sun on the default sky sphere), there is visible smearing/blurring when moving camera.

I’ve also attached a simple repro project:

To see the issue:

  1. In the included ReproMap, play in editor and move camera when looking e.g. at the sun. There is no smearing.
  2. Stop playing, in the ActorWithSceneCapture actor that is placed in the scene, assign the RenderTarget_4k asset to the Render Target field.
  3. Play in editor, move the camera when looking at the sun - there is a visible smearing/blurring.