Hi @artblimp ,
Nice! The easiest thing would be to split up the coordinates for each of the pieces, then adding a few extra coordinates for “phantom pixels” at the end that create a bounding box for the larger coordinate space that encompasses all 3. Those pixels won’t exist on the piece, but will cause the map to place the piece in the right spot. An example can be found here:
Each Pixelblaze in the group needs it’s own map, and LED settings, only the pattern information and brightness, and UI controls are shared.