You can change the Z value. If i remember correctly, you need to select the landscape actor that is being created, not the the proxy's them self. If the values are greyed out you need to right-click on the landscape actor and ''unlock transform''. now you can change the height.
Hi, i needed to edit some of the weight maps in Photoshop, i then exported them to 8bit grey scale, however they are still double the total bits and file size when i check the details of the image in windows. :?