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Fixed in 2020.1.X

Fixed in 2019.3.X



Found in


Issue ID




[CPU PLM] Progressive lightmapper produces artifacts in scenes containing a lot of indirect light

Progressive Lightmapper


Steps to reproduce:

1. Download CornellBox project
2. Make sure that all lights in the Hierarchy panel are disabled
3. Make sure that CornellBox_FrontFace object is disabled
4. Navigate to the Lighting Settings window, and make sure that Skybox material is set to studio_03
5. Set Environment Lighting source to Skybox
6. Select Progressive CPU as the lightmapping backend
7. Bake the lighting


- Reproduces in Unity versions 2019.3.0a9 and onwards
- Only affects the CPU lightmapper

Comments (1)

  1. michellerodri247

    Aug 19, 2019 09:54

    Thank you so much for the reproduce steps. The steps are clear and understanding. With the help of this properly followed steps, it is easy for a person to handle the reproduce option perfectly . The notes that are added is also the best direction for the users.

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