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By Design
Votes
0
Found in
6000.0.0b14
Issue ID
UUM-69479
Regression
Yes
Disc Area Light shows incorrect Lumen intensity value when upgrading the Project
Reproduction steps:
1. Open the attached “DiscLightIssue.zip” project
2. Open the “Demo” scene
3. Select “Disc Light” GameObject in the Hierarchy
4. Observe the Emission Intensity value in the Light Component
Expected result: The intensity value is “200” Lumen
Actual result: The intensity value is “4074.367” Lumen
Reproducible with: 2023.3.0b5, 6000.0.0b14
Not reproducible with: 2021.3.37f1, 2022.3.23f1, 2023.2.17f1, 2023.3.0b4
Reproducible on: Windows 11
Not reproducible on: No other environment tested
Note:
- In 2023.3.0b5 the intensity value turns “81.05695” and the unit field turns empty, however when Lumen unit is selected again - the value turns “4074.367”
- With the “Rect Light” (Rectangle Shape light) GameObject the issue does not reproduce
- Does not seem to affect the actual Light intensity
- Reproducible on a new project, but the Light intensity value sometimes increases and sometimes decreases
- Another odd behavior is that when trying to copy the intensity value by pressing “Ctrl+C”, the copied value is actually the “Filter” property color code and not the actual value of the intensity
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Resolution Note:
This is not a bug, but actually an issue that has been fixed. The lumen value display for disc lights was not correct before, as it did not take the radius of the disc light into account. The new value you are seeing is the actual lumen value.
Note that lumens are always relative to the surface area of an area light. If lumens are selected as the light unit on an area light, you will notice that changing the area lights' surface area in the editor will result in the light becoming dimmer/brighter. In case you prefer that your area lights remain at a constant brightness regardless of their size, you should set them to nits instead.