Reproduction steps:
1. Create a new 3D URP project
2. Disable "Texture Mipmap Stripping" in Edit > Project Settings > Player > Other Settings
3. Open Edit > Project Settings > Quality
4. Set the quality level's "Global Mipmap Limit" to "0: Full Resolution"
5. In the Levels matrix, untick the Desktop platform checkbox on every quality level
6. Observe the area under "Global Mipmap Limit"
Actual result: The info box "Detected platforms with textures that never use their highest resolution mipmap levels. Enable Texture Mipmap Stripping in the Player Settings to reduce the package size of those platforms." is shown
Expected result: No mipmap stripping hint is shown
Reproducible with: 6000.0.1f1, 6000.0.82f1, 6000.3.23f1, 6000.5.10f1, 6000.6.0b9, 6000.7.0a5
Reproducible on: Windows 11, Ubuntu 24.04
Not reproducible on: No other environments tested
Notes:
- Re-ticking the Desktop checkbox on any quality level makes the hint disappear; the mipmap limit value itself is unchanged throughout, so the toggle alone drives the false positive
- Enabling Texture Mipmap Stripping in Player Settings suppresses the hint unconditionally, so the issue only reproduces while stripping is disabled