Please see the images at http://www.appropel.com/kevin/Clouds/. Initially the clouds look great from down below. As the aircraft approaches the layer they become a featureless gray plane. Passing through the clouds appear to have no thickness, and above they remain a flat gray.
I am seeing the same thing. It seems to be a problem with stratus layers. They look great from down below but as the aircraft reaches the layer they suddenly turn into a flat grey sheet. I will capture an image or video.