Simple camera effects don't work in the game build

Code (CSharp):

1.    
2. void OnTriggerEnter(Collider collider)
3.     {
4.         cam.backgroundColor = new Color(0, 0.4f, 0.7f, 1);
5.         RenderSettings.fog = true;
6.         RenderSettings.fogColor = new Color(0, 0.4f, 0.7f, 0.6f);
7.         RenderSettings.fogDensity = 0.05f;
8.     }
9.  

This is my rough attempt to create an underwater effect.
Despite the fact it doesn't look realistic I can clearly see it when I play the scene from the editor.
However when I build the game it's just like if that code doesn't exists, I can see in the console that the event triggers and I can play sounds there but these effects are not displaying.

 

You should mention what platform you are building for, what rendering type, if you are using one of the post processing stacks, etc. Add a Debug.Log line to the top of OnTriggerEnter to verify the trigger is occurring. Also, check for any null reference errors.

And see if these apply to your situation:
https://support.unity3d.com/hc/en-u...bling-the-Fog-in-a-built-game-is-not-working-
https://answers.unity.com/questions/1401239/rendersettingsfog-doesnt-work-on-android.html