3D Designer needed to create Greyscale Depth-Map pictures

I'm looking for a 3D Designer who can create greyscale depth-map pictures of intricate scenery. The Depth map (or Height map) should be a greyscale picture that shows the distance of the objects from the camera. See attached for similar examples. I need a 6"x4" high-detail greyscale picture depicting a detailed beautiful scene. Something like a nature scene, horses running, kittens playing, etc. The more detail in the pictures the better. The scene must be original artwork. My end use (CNC machining) does not create a perfect translation into 3D, so depth must be exaggerated. The finished picture must have a border like a picture frame, leaves with vines, or a simple chamfer to start. Again, the more detail the better.