Yes. If you right click on a paint layer there is an option to export it to file. The default size was aroud 400x400 pixel, which is pretty low. If I increase the landscape resolution to max and rescale it, then I get nearly 2K. Although the landscape is rather small now, it is usable for my case. But the resolution of the landscape is ridiculous now, like 1poly/1cm. Quite a performance hog.