There are many surfaces that don't fully reflect the items above it. For example, hardwood floors reflect, but only to a point. The further away from the floor an object is, the less it reflects. You can simulate such an effect with the Falloff parameters in Reflector. Set the Falloff Starting Point and Distance, then select the Falloff checkbox. Update your scene to see the effect.There will be occasions where you don't want every layer to show up in your reflective surface. Sometimes it's for a desired effect (like the Vampire image below). Other times it's because a layer just doesn't look right in the reflected area. The Hide 2D Layers parameter takes care of many distracting layers, but there may be 3D layers that need hiding has well.
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