You can add fog to globally affect entire scenes.

To set the ambient fog for the entire scene:

1. In the Asset browser light settings, select Global Light.
2. Activate the Enable Fog option.
   

   Global Light settings A. Fog option enabled

3. Enter a new value in the Color settings or click the Color button to open the Color window and change the fog’s color.
4. Click the Animate (A) button beside the Color settings to activate this setting for animation.