Here is an image I just rendered in the free version of Vue. just so you can see what the water mark looks like. All the rocks you see are 3 dimensional not just a texture. they were created with a material called an ECO system material. The material stores 3D objects and disperses them randomly.  The clouds were generated by the program as well, not an image. Very realistic if you fool with the controls a little. Click to enlarge the image to see the detail. regards, Tom