Hey! I love the tool so far! Thanks! I did experience the bleeding issue when exporting to Unity (following the guide and using the guide tileset), but I'm going to try following the advice in the other thread for that.
In the meantime, there was another issue I haven't read about. Within Blender, each tile/plane renders on both sides, however, when I export the object to Unity, each plane only renders on one side and the other side is invisible (as expected for a plane). Do you know how I can view this true render state in Blender? And is there any way to automatically place two opposing planes so that it renders on both sides? I have a feeling if I just try creating two tiles on the same vertex but on each side, it'll just replace the first one I place with the second one. Does that make sense?