Nice to see Calyxa making an appearance here! I've learned a lot of my Brycing skills reading her tuts; all highly recommended. I thought I would add my 2 cents here as this is an area of particular interest and exploration for me. In the first pic you can see the results of importing a celtic knot .obj from KnotPlot and doing an ALTITUDE render of it from top view. I set up a square document (512x512) and scale up the knot so it fills most of the screen. This makes it dead-simple to use the same render in the picture section of the terrain/lattice editor and then I apply it to a terrain of the same resolution.