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By Design
Under Consideration for 6000.2.X, 6000.3.X
Votes
0
Found in
2022.3.57f1
6000.0.37f1
6000.1.0b5
6000.2.0a1
6000.3.0a1
Issue ID
UUM-96974
Regression
No
[SW-unity-6-1] The light flickers when “Alpha Blend” Overlap Operation is used
Steps to reproduce:
1. Open the attached "IN-93249" project
2. Open the "Main" Scene and enter Play mode
3. Move the character to the right until you reach a staircase
4. In the Hierarchy select Main → Lights → Crypt → Light Group - Entrance - 1 → Light Entrance GameObject
5. Change Overlap Operation from "additive" to "Alpha Blend"
6. Move the character around the entrance
7. Observe the Game view
Expected result: Light shines consistently
Actual result: Light turns on and off depending on your position near the entrance
Reproducible in : 2022.3.57f1, 6000.0.37f1, 6000.1.0b5, 6000.2.0a1
Reproducible on: Windows 11
Not reproducible on: No other environment tested
Note: Reproducible in Scene view as well
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Resolution Note:
The lighting in the scene is order dependent if the blend mode changes to Alpha Blend. In the original Lost Crypt project, Light Group - Entrance 1 -> Light Entrance and Light Group - Entrance 2 -> Light Entrance are set to blend additively. As the blend mode is additive, the order doesn't matter as the results are added together. However, this is no longer true if set to Alpha Blend. The Light Order setting on the Light2D can be used to resolve the issue to ensure the draw order of the lights.