Recently I attended Shore Cottage Studio for a two day class in laser cutting. I took along some felt I had made from two layers of Merino wool and a design based on the cross section of an onion. The pen drawing was scanned and converted to a CAD outline telling the laser where to cut. The end result was three sliced onions created from separate pieces of felt which I then interchanged in the same manner as traditional mosaic felt.
It was a beautiful location as you can tell from my pics below and my tutor Kris was extremely helpful. See further details of the courses at http://www.shorecottagestudio.com/