Reproduction steps:
1. Open the attached “IN-121644.zip” project
2. Open the “SampleScene” scene
3. Open Window > Analysis > Frame Debugger and enable it
4. Click on ExecuteRenderGraph > (RP 2:0) DrawSkybox
5. Observe the Output

Expected result: Skybox and a grey cube are visible
Actual result: Only a blue screen is visible

Reproducible with: 6000.0.54f1, 6000.0.60f1, 6000.2.9f1, 6000.3.0b7, 6000.4.0a3
Not reproducible with: 6000.0.53f1

Reproducible on: macOS 15.7.1 (M2 Max), macOS 15.3 (M2 Ultra), Windows 11
Not reproducible on: No other environment tested

Notes:
- The issue reproduces with SMAA or TAA enabled in “Anti-aliasing” on the “Main Camera” GameObject and FSR or STPP enabled in the “Upscaling Filter” on the “PC_RPasset”
- On the Main Camera Component, changing the “Anti-aliasing” setting to No Anti-aliasing shows the expected result
- This issue includes passes such as DrawOpaqueObjects, DrawSkybox, and DrawTransparentObjects
- Does not reproduce with DX11, but reproduces with DX12 and Metal