Shadow artifacts when using the Lightmaps to generate Lighting
Unity: Progressive Lightmapper
As Designed
2023.1.X
2022.2.X
2022.1.X
2021.3.X
2020.3.X
What you are seeing here are invalid texels, which are result of hitting backfaces. Please enable Double Sided Global Illumination in the Material settings. Otherwise, cap the open faces for the tree canopies.
Reproduction steps:
Open the attached project
Enable the “Auto Generate” setting in the Lighting window (Window > Rendering > Lighting)
Observe the shadows under the “Tree_CherryBlossom” GameObject in the Game View
Expected result: No artifacts are seen and the lightmap is correctly generated
Actual result: Artifacts under the tree are seen
Note: Setting the “Filtering” setting to “None” or playing around with the “Indirect Samples” and the “Environment Samples” settings in the Lighting Settings Asset can reduce the artifacts but they do not disappear
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