The maps I am trying to upload use a standard grid but were meant for printing so they have a half square all around the edge. I cannot crop this out to make it fit because 1) the grid lines for the top of the map are invisible as they are over black space and 2) cropping out the half square would erase part of the image that is needed for the tiles to fit together. Is there any way to get this map to actually work on roll 20?