Getting the image variable
Call the getResult() method to get a variable containing the merged image of your document:
$backgroundColor = "FFFFFF"; $image = $layer->getResult($backgroundColor);
Note that it doesn't merge physically your sublayers, and you can continue to work after calling the method.
$backgroundColor can be set null or "transparent" if you want to get a transparent PNG image.
Be careful, always give a none transparent background color if you want to get a JPG or GIF image: otherwise, the transparency of sublayers won't be conserved and you'll probably have some display bugs !
You have the image variable, now you will see how to show it in the navigator.