PostProcess and SkySphere

Hi people, I have an issue lately and I cant understand whats really going on. I have a scene with: BP_Sky_Sphere, ExponentialHeightFog,Skylight and 1 directional light. In the first picture you can see how it looks my final result in the editor.Once I go into play mode, I have totally different results. I am loosing the green effect that I want. Its like I dont have a post process volume. What i have messed with around are the Contrast/Gamma/Gain settings from the Global Grading.Any help will be appreciated.