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Fixed in 2017.3.0f3



Found in


Issue ID




[Forward] Realtime lights set to Not Important do not work with Shadowmask

Progressive Lightmapper


Realtime lights set to "Not Important" in Render Mode are not computed correctly in Shadowmask/Distance Shadowmask mode.

Steps for reproduction:
1) Download the project "" and open the scene "Bug"
2) Generate the lighting in "Subtractive" mode
3) Observe that realtime point light contribute lighting to dynamic object (i.e. Sphere)
4) Change the light mode to "Shadowmask"
5) Observe that realtime point light does not contribute lighting to dynamic object

- Lights that have their Render Mode set to Not Important are always per-vertex or SH. Vertex/SH light should be handled in shadowmask/distance shadowmask mode (i.e. occlusion should be computed on the CPU)
- In the reproduction scene, there is one mixed directional light, one realtime point light and there no light probes.
- On the image attached below, plane is light map static, sphere is dynamic
- It works correctly in deferred rendering path, but works incorrectly in forward rendering path.
- Not a regression, realtime lights set to “Not Important” never worked since the introduction of light modes

Comments (138)

  1. rafikabir

    Feb 23, 2024 11:47

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  2. rafikabir

    Feb 23, 2024 11:43

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  3. fixsquadwebmaster

    Feb 04, 2024 17:28

    The issue with realtime lights set to 'Not Important' not working correctly in Shadowmask mode in Unity is a good reminder of the complexities in both game development and hardware functionality. As a technician specializing in iPhone repair at Fixsquad, I find parallels in how specific settings or modes can impact performance. Just as certain light settings in Unity can affect visual output, specific configurations or software updates in iPhones can influence their functionality. Understanding these intricate details is crucial for both game developers and those of us in the repair industry to ensure optimal performance and user experience.

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    Dec 13, 2023 17:47

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    Jan 09, 2023 16:00

  7. countrycheapammo14

    Dec 23, 2022 10:04

  8. countrycheapammo14

    Dec 23, 2022 10:02

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  9. doradotarde43

    Oct 29, 2022 16:03

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  10. pikashow

    Jul 20, 2022 14:09

    I was convinced that you would probably have something useful to say. I hear nothing but a bunch of whining about something that you can easily fix if you were not so busy looking for attention that you would not know how to fix it. At the end of the day, I know it was my choice to read...

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