Looks like there is some new code that cause the sky to not be rendered if your camera y is below zero. There is some new code in the shader that does this by checking to see if we are within the planet radius and not rendering the sky if so. This doesn't make much sense since even if I am standing below the horizon line I may still be able to see the sky. 1. Create scene with physically based sky 2. Move camera below 1 on y axis. Notice that the sky is visible 3. Move camera down by 2 units. Notice how the sky is missing.