draw( targetMap.toNewImage(), "Target map" );
DoubleMap doubleMap = new DoubleMap( mapSize, mapSize );
doubleMap.paste( targetMap );
doubleMap.paste( sourceMap, 0, 0, DoubleMap.PasteMode.ADD );
doubleMap.limit();
draw( doubleMap.toNewImage(), "Adding source map to target map" );
doubleMap.paste( targetMap );
doubleMap.paste( sourceMap, 0, 0, DoubleMap.PasteMode.MULTIPLY );
draw( doubleMap.toNewImage(), "Multiplying source map with target map" );