[alfiejmulcahy]

But you can see the equipment under the desk in this case, because at that angle there's not enough green for it to be keyed out.

As shown here, especially in the first image you can only see a reflection in the areas where green can be reflected by the real perspex top. The real studio lights are also being reflected. And if you look carefully at the bottom corner of the tabletop in both images, the section where no green is reflected appears black, and does not reflect the virtual surroundings.