Repro project: https://drive.google.com/drive/folders/1HumNeoSQ_dSMWpo7Lt12l5QMEiY_hjdV
Reproduction steps:
1. Open the attached project "ReproProj"
2. Open the “Assets/Scenes/City.unity” Scene
3. Open the Lighting window (Window > Rendering > Lighting)
4. Click Generate Lighting
5. Open the Windows Task Manager
6. Observe the memory usage until it’s about 100%
7. Observe the free storage of the drive where the project is located
Expected result: Drive storage is not affected
Actual result: Unused drive storage starts to shrink
Reproducible with: 2021.3.40f1, 2022.3.38f1, 6000.0.10f1
Reproducible on:
Windows 10 Enterprise 21H2
Not reproducible on:
No other environment tested