I add this texture to the map and it was not too hard. But I can't figure out how I would go about making them stick below the buildings and streets. I would prefferable want to color them diffrently!
How could I do that? If it is at all possible...
GroundOverlayOptions overlay = new GroundOverlayOptions();
overlay.position(latLng, 64, 64);
This is not possible. Ground Overlays (and also Tile Overlays, Markers, Polygons, ...) are drawn on top of the base map.
You can only control the
zIndex that controls the order in which the ground overlay is drawn with respect to other overlays (although always under the Markers)