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Votes

1

Found in

6000.0.43f1

6000.1.0b11

6000.2.0a7

Issue ID

UUM-100965

Regression

Yes

Material artifacts occur in the Material Preview window when baked lighting is applied to scenes

-

How to reproduce:
1. Open the attached “IN-96508” project
2. Open the “MainMenu” Scene
3. Generate the lighting by going to Lighting > Scene > Generate Lighting
4. In the Project window, go to Assets > Materials and select “BaseMaterial” to view it in the Inspector.
5. Observe the result in the Material preview window

Expected result: Material renders smoothly
Actual result: Material is rendered with artifacts

Reproducible in: 6000.0.0b15, 6000.0.43f1, 6000.1.0b11, 6000.2.0a7
Not reproducible with: 2022.3.60f1, 6000.0.0b14

Reproducible on: Windows 11, MacOS 15.3.1 (M1 MAX)
Not reproducible on: No other environments tested

Notes:
- Artifacts are shown differently per baked Scene.
- Couldn't reproduce the issue after removing "Searcher" Package

  1. Resolution Note:

    Thank you so much for your detailed report! We’ve reviewed and were able to reproduce the issue you described, but we believe this behavior is working as intended.

    This issue occurs because of the position of APV sampling. In the MainMenu scene, we were able to see that a plane is placed. As a result, the APV outcome appears darker in areas where the y-coordinate value is less than 0. This stark contrast is displayed as it is because the material preview uses (0, 0, 0) as its origin. We could also reproduce it in the scene view when we place a new sphere object at the (0, 0, 0) position. Additionally, artifacts come from the added sampling position noise in APV.

    In summary:
    1. The preview rendering is influenced by the baking results of each scene.
    2. Issues arise in the MainMenu scene due to the APV results around the y-axis value of 0, caused by the plane setup.

    Although several ideas to fundamentally resolve this issue were considered, it was determined that addressing only the preview rendering would inevitably lead to certain limitations currently.

    Thank you again for bringing this to our attention! If you have any further questions or encounter other issues, please don’t hesitate to reach out to us.

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