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Silhouette Smear/Blur on Metallic Reflections with high Brightness Bug

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Hey guys,

I couldn't find anyone with a similar problem:

My current version is UE 4.12.5:

For some reason the shape of my character and the border of my screen is smeared/blurred across metallic surfaces every time when he moves. Planar reflections is turned off and Motion blur is disabled and turned off in the Project Settings. The only PP effect that is enabled on the screenshot below is Bloom. This happens in VR as well, and is also noticeable when I place foliage in front of a metallic surface (see second image). The problem also persists in UE 4.13alt text

The issue can be seen more clearly when the light level of the World exceeds 100 units (.e.g 200), which can happen when a Day/NightBlueprint is incorporated, that calculates light levels above the determined values. My FPS are always above 60 FPS, so it's not a lag issue.

This issue can be recreated in a new project:

  1. Select "Third Person Blueprint" from the templates and create the project

  2. Click on the Floor Mesh of the demo level and double click on "CubeMaterial" to open the Material Editor

  3. Connect "Constant 1" with Metallic and "Constant 0" with Roughness and Specular.

  4. Set the directional light level to 200

  5. Play in Editor and observe a silhouette/bodypart smear when the player moves in front of dark surfaces

Product Version: UE 4.12
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asked Aug 29 '16 at 05:31 PM in Rendering

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Hello jalte,

So have you added a sphere reflection capture to your scene at all?

I just ran your test using the steps you provided and was able to see the issue on my end, but upon further investigation if I added a Sphere Reflection Capture to the level, the issue was very minimal and hardly noticeable.

Have you tried adding a Skylight to your level with a custom cubemap as well?

Let me know if you have further questions.


Andrew Hurley

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answered Aug 29 '16 at 09:29 PM

avatar image jalte Aug 29 '16 at 10:15 PM

I LOVE you. Thank you so much! I've been trying to fix this for weeks!!

Since I only have a single enormous water/ocean volume, that is too large for a single reflection capture I never felt the need to add one. Once I added a single medium sized reflection capture the smear disappeared and everything looked perfect just as it should.

Once again THANK YOU!

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