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By Design

Votes

0

Found in [Package]

14.0.0, 13.1.5, 13.1.2, 12.1.4, 12.0.0, 11.0.0, 7.7.1

Issue ID

1400047

Regression

No

[HDRP] Light intensity resets after 2 frames after changing it in the script

Package: Scriptable Render Pipeline HD

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How to reproduce:
1. Open attached Unity project (hdrp-light-intensity-issue)
2. Load OutdoorsScene
3. Select Sun gameObject
4. Notice intensity is set to 0
5. Enter play mode
6. Notice intensity is still 0
7. In the console window, you can see that light intensity resets after a couple of frames

Expected result: Intensity should be set to 1000.
Actual result: Intensity is set to 1000 for a couple of frames, then resets to 0.

Reproduced with: 2022.2.0a3 (HDRP 14.0.0), 2022.2.0a1 (HDRP 13.1.2), 2022.1.0b7 (HDRP 13.1.5), 2022.1.0a2 (HDRP 12.0.0), 2021.2.11f1 (HDRP 12.1.4), 2021.2.0a1 (HDRP 11.0.0), 2019.4.33f1 (HDRP 7.7.1)

Notes:
This doesn't happen with the Built-In render pipeline.
This issue doesn't reproduce in the build.

  1. Resolution Note:

    This issue is by design. HDRP have its own intensity field that is different from builtin as it rely on physical light unit.
    The scripting API to set light is on the HDAdditionalData component: https://docs.unity3d.com/Packages/com.unity.render-pipelines.high-definition@7.1/api/UnityEngine.Rendering.HighDefinition.HDAdditionalLightData.html?_ga=2.187700392.1256829761.1644225368-683797712.1641845328#UnityEngine_Rendering_HighDefinition_HDAdditionalLightData_intensity

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