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Fixed in 2020.1.X



Found in



Issue ID




[PLM] Baked contribution from high intensity HDRIs is not handled properly in linear color space

Progressive Lightmapper


Steps to reproduce:

1. Import the attached project
2. Open one after the other "Lightmapsky.unity", "Lightmapsky2.unity" and "Lightmapsky2_Enl.unity"
3. Optionally: Try rebaking the lightmaps in the scenes.


- The exposure is tweaked in the scene so that the background sky is exposed the same between all scenes.
- When using Gamma color space, the rendering is way closer, although not identical.
- This is particularly affecting HDRP as working only in Linear color space and physical light units (high exposure for the sky) affects the ambient baked lighting.
- Scene "Lightmapsky2_Enl.unity" is using Enlighten as static lightmapper and doesn't seems to be affected by the issue.
- Affects both CPU and GPU lightmappers.

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