Steps to Reproduce :
- Open the attached project : BlendProbeOff.zip
- Open the SampleScene scene
- Select the Cube Gameobject
- For the LightProbes option in the MeshRenderer settings, switch from BlendProbes to Off
- In the Environment Tab of the Lighting Window, use a Color for Source of the Environment Lighting, change the color to see if this affects the cube.

Actual Results : No change in the cube Lighting, it is still sampling APV, even if the BlendProbes is set to Off.
Expected Results : The cube should ideally fallback on the ambient sky, and be affected by the Environment color set in the Lighting Window.
Otherwise, if this is not feasible for technical reasons, we should at least add a warning under the LightProbes option in the MeshRenderer settings. For example, when selecting Use Proxy Volume, only available for LightProbeGroups, we display a warning to say that BlendProbes mode will be used instead.

The expected behavior can be tested with LightProbeGroups : 
- In the URP asset, for the LightProbeSystem, switch from AdaptiveProbeVolumes to LightProbeGroups
- Generate Lighting using the Lighting Window
- Select the Cube, and switch the LightProbes option from BlendProbes to Off
- Notice how this affects the cube lighting

Reproducible with versions: 

Not reproducible with versions: 

Can’t test with versions: 

Tested on (OS): 

Notes: