Search Issue Tracker

Fixed in 2022.2.X



Found in


Issue ID




[LightProbes] Probes lose their lighting data after entering Play mode when Baked and Realtime GI are enabled

Progressive Lightmapper


Steps to reproduce:

1. Download the attached project and open SimpleOutdoorsA scene
2. Make sure that both baked and realtime GI are enabled in the Lighting settings
3. Make sure that Auto Generate is disabled in Lighting settings
4. Generate lighting
5. Enter play mode
6. Notice that light probes have lost their lighting data


- Reproduced in: 2017.4.6f1, 2018.1.4f1, 2018.2.0b8, 2018.3.0a1 (330986351f8d), 2018.3.0a3 (0ac1bca97520)
- Affects both desktop and mobile platforms

  1. Resolution Note (fix version 2022.2):

    Will be addressed as part of a larger refactor of the Light Probes area.

Comments (10)

  1. unity_03E3DB72C25029EB7262

    Dec 26, 2021 06:01

    I need to make a zepeto item and I can't why?

  2. arvzg

    Sep 25, 2021 10:17

    seems to be happening even on the very latest version as of today - Unity 2021.2.0b12.

    Everything seems to be working after bake, then one of several things I do can cause the light data to disappear:

    - Move the object (doesn't always happen)
    - Save scene (doesn't always happen)
    - Enter play mode (always happens)

  3. StellarVeil

    Aug 10, 2021 08:30

    I think it's worth mentioning that the bug affects realtime lights only, mixed ones don't lose their data in the probes.
    Also realtime lights don't lose their data if only realtime GI is enabled.

    It is still problematic though as in some cases where you have more than 3 mixed lights overlapping, the 4th nearby one needs to be realtime otherwise it looses its light if you bake in Shadowdistance mode (which has a 3 mixed lights overlap limit).

  4. Soahr

    Jun 21, 2021 14:47

    Still the same issue on 2021.2.0a21.2949 ...

  5. VengadoraVG

    Feb 02, 2020 01:58

    so, is that it? "WON'T FIX"... are we going to just have to deal with crappy lighting for the rest of our lives? >__>

  6. fildax

    Sep 27, 2019 14:34

    Only happens when baking with plm. Every version I tried since plm introduction.

  7. tetto_green

    Aug 31, 2019 20:46

    It's still there in Unity 2019.1.14. and not even a comment here. Unbelivable. I am really close to switch to other engine after 4 years of using Unity...

  8. tetto_green

    Apr 29, 2019 02:58

    Addition: this data loss is observable only when baking light with Progressive Lightmapper. The problem was caused by the Ambient Light in Realtime mode.

  9. tetto_green

    Apr 28, 2019 22:58

    Same. 2018.3.12f1. To be more accurate, only the indirect lighting data is lost in my case.

  10. Midev

    Mar 06, 2019 11:04

    We are having the same problem in version 2018.3.7f1

Add comment

Log in to post comment

All about bugs

View bugs we have successfully reproduced, and vote for the bugs you want to see fixed most urgently.