Ok here's a materials tutorial. Find a texture you like, open it in photoshop or similar, and resize the canvas to either 1024x1024 or 2048x2048 dependeing on desired detail. Paint an alpha map for it in a new layer, then paste the map over the alpha and set it to "multiply" at about 20%. (Sorry, don't have time to explain terrain painting right now, do a google search there's lots of info). Then save that alpha map as a tif. Now you can toss the alpha layer, and save the color texture on the sized canvas (it's important you paint the alpha using the texture as a direct reference, becvause otherwise they won;t line up in bryce). Save to color texture as a tif as well. In bryce, make a terrain or lattice, and hit "E" to edit. Set the terrain to the resolution you chose for your texture. (1024 or 2048) In the pictures tab, load the terrain alpha map you created, and paste it to the second box then hit "apply." Clip if you need to then go back to the main window and make it very small on the Y-axis (between 1 and 3 for most objects like walls and floors, 3-6 for thicker objects like beams and such). Plop render to check the thickness, we are going for understated realism, not garbled crazy undulating realism. With the object selected, enter the material lab, and from there the images tell you what to do. Oh and make sure all your lights are set to "squared" falloff as it's much more realistic than linear. You'll need to make them quite a bit brighter to begin with. CHeers!