Number of panels: A matrix is made of 1 or more physical LED panels.
Each panel can be of different size and/or have different LED orientation and/or starting point and/or layout.
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LED panel layout
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Gap file:
Note: Gap file is a .json file containing an array with number of elements equal to the matrix size.
A value of -1 means that pixel at that position is missing, a value of 0 means never paint that pixel, and 1 means regular pixel.