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Votes
1
Found in [Package]
9.0.0-preview.33
Issue ID
1261949
Regression
No
Decal Projector that uses Emissive Material bleeds over other Mesh edges when Texture's "Generate Mip Maps" option is enabled
How to reproduce:
1. Open the attached project's Scene labeled "SampleScene"
2. In Scene View, observe the Decal Projectors
Expected result: Decal Projector that uses Emissive Material with Texture's "Generate Mip Maps" option enabled don't bleeds over other Meshe edges
Actual result: Decal Projector that uses Emissive Material with Texture's "Generate Mip Maps" option enabled bleeds over other Mesh edges
Reproducible with: 2019.4.4f1 (7.3.1, 7.4.1), 2020.1.0b16, 2020.2.0a16 (8.1.0, 9.0.0-preview.33)
Couldn't test with: 2018.4.25f1, 2020.2.0a17, 2020.2.0a18 (Crash when opening the "SampleScene", related to Case 1261599)
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Resolution Note:
After investigating the issue, the world space position is used to compute the texcoord sampling positions for the emissive map, which leads to high derivatives and thus reading from a "lower" mip. Given the high difference in intensity even a very light gray value maps to a high intensity. If it was a normal or a base color it wouldn't be that bad. So the solution here is to simply disable the mips in these kind of cases.