Proper Way of Integrating Fresnel

[SM-OConnor]

Thanks for the replies. It makes much more sense now–I also found this in a blog post by Epic:

Since every surface in reality has some form of specular reflection, UE4 gives every material specular highlights and scene reflections. The amount of reflection is also affected by how the surface is angled in relation to the camera. If the surface is non-metal and facing the camera it will specularly reflect about 4% of light; if the surface is at a grazing angle to the camera it will specularly reflect almost 100% of light.