Sampling a custom depth texture on a machine with a GTX 1080 makes object's textures display the wrong color when in Play mode or Player

How to reproduce:

1. Open the attached project
2. Open the “SampleScene” Scene
3. Enter Play mode or Build And Run

Expected result: Cube is yellow
Actual result: Cube is red

Reproducible with: 2021.2.0b4, 2021.3.5f1, 2022.1.5f1, 2022.2.0a21
Not reproducible with: 2019.4.40f1, 2020.3.36f1, 2021.2.0b3

Reproducible on: Windows 10 with GTX 1080
Not reproducible on: macOS (Intel) Monterey 12.3.1

Notes:

• 2021.3.3f1 with GTX 1080: red cube
• 2021.3.3f1 with GTX 1660: yellow cube
• 2021.3.3f1 with RTX 2080: yellow cube
• 2019.4.39f1 with GTX 1080: yellow cube
• 2019.4.26f1 with GTX 1080: yellow cube
• 2019.4.26f1 with GTX 1660: yellow cube
• 2019.4.26f1 with RTX 2080: yellow cube

 

UPDATE 2/21/2023: 

The user is sampling a depth texture and Unity by default assumes this is a shadowmap and uses a comparison sampler. Since no comparison value is provided this causes undefined behavior on some drivers. This can be worked around by overriding the shadow sampling mode after creation. We could fix this by exposing a way for the user to indicate whether or not a depth texture is a shadowmap in the RenderTextureDescriptor but not sure if this is worth prioritizing.