Playing around a little with the settings I obtained these results:
To leave Zmapper click anywhere out of the canvas area and you will have this:
Export the map as you did previously for the colour map.
Now we will create a displacement map which will be used later as a bump map. Open the Zplugin menu and open the multi-displacement section.
As you can see in the image, like for the color and normal maps, Max map size is important, and so is map quality (DpSubPix).
After having chosen the settings that you prefer, click on export options. A window will pop up. In this window, again, choose the settings and close. Then, in the Zplugin menu, click on create all.
