The basic idea behind the Expanse Frame is to pull the frame off the image, letting the picture stand on its own while offering a transition from the image to the other parts of the room / furnishings.  

The color of the wall comes thru and makes it seem to be more a part of the room than something in the room. 

Variety in materials, variety in sizes...

All of my Grouped Frames are a subset of the Expanse Frames...