The fact is that if you want to resize tiles with canvas, the server needs to allow cross origin requests from "*". This not the case of the server you specified, it's the reason I have changed the url to one of our servers (they allow cross origin). If you don't do that, you can't test resizing (and some tiles are totally ugly). Do you still want me to remove it ? I can create a select box, with your and mine picture, as you want !