The basics are the same with fusing as with traditional stained glass.
You start with a basic shape, break it down into specific design elements, and cut separate pieces. They can be stacked several layers high. Here, the pieces are partially cut.
Here all the pieces are cut into their design elements.
Next is fusing. In fusing, the piece is heated up to about 1450 degrees and slowly cooled. This step takes most of a day. The piece will now be about 1/4" thick.
The final step is to heat the piece again, this time over a mold. In this step it's heated to a slightly lower temperature of 1200 degrees. Gravity takes over and the glass relaxes into its new shape.