public void setup() {
size(830, 420, OPENGL);
map = new UnfoldingMap(this, "map1", 10, 10, 400, 400, true, false, null);
MapUtils.createDefaultEventDispatcher(this, map);
mapDisplayShader = new MaskedMapDisplayShader(this, 400, 400);
((OpenGLMapDisplay) map.mapDisplay).setMapDisplayShader(mapDisplayShader);
mask = mapDisplayShader.getMask();
mask.beginDraw();
mask.background(0);