This is the design (see below). It has the original painting in the center, but it's been extended by a circle to echo the interior design theme. There will also be a mosaic border, shown here only with the mustard color.
Here is the board. It is 5'9.5" square made of two layers of wedi board. I made it so the pieces are arranged so there are no straight lines all the way across. This will make it stronger.
I used an overhead projector to trace the design onto the board.The center green space and all of the buildings will be on a 1/4" raised panel.
Getting started! I'm going to try to tame the greens with more yellow based greens.