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By Design
Votes
0
Found in
2020.3.45f1
2021.3.19f1
2022.2.7f1
2023.1.0b5
2023.2.0a4
Issue ID
UUM-28112
Regression
No
Color bleeding in lower mip levels when Convolution is enabled in Cubemaps
Steps to reproduce:
1. Open the attached user's project "T1490080.zip"
2. Select the "Assets/christmas_photo_studio_01_1k.exr" file to view it in the Inspector
3. Set the Convolution Type to None, and enable Border Mip Maps. View a lower mip level in the preview and notice the color is not bleeding.
4. Change the Convolution Type to either Diffuse or Specular and check again a lower mip level. Notice the light is separated incorrectly.
Expected: Border Mip Maps prevents color bleeding, even when Convolution is enabled
Result: Border Mip Maps has no effect when Convolution is on.
Reproducible on: 2020.3.45f1, 2021.3.19f1, 2022.2.7f1, 2023.1.0b5, 2023.2.0a4
Probably by design (but maybe some unexpected outputs, which are not necessarily the focus of this bugcase)? See https://unity.slack.com/archives/C06TQ5M4J/p1678100359688149
Notes:
-Reproducible with both Built-in and Universal RP
-A video (Cubemap_BorderMipMapsIgnored.mp4) is attached demonstrating the issue
-The Border Mip Maps option works fine when Convolution is set to None. However, if it’s set to either Specular or Diffuse, the colors start bleeding, more noticeably in lower mip levels
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Resolution Note:
The functionality works as intended however there are some issues with options that are not applicable when using convolution. We have added an item on the roadmap to improve the UI such that it is clear which options apply.