Fog and haze, as DD said, are your first and best option. Generally, a lower camera angle helps for deep mountain scenes. Something else that helps for mountains that should have trees is taking your mountain terrain and adding small spikes in the terrain editor. You may want to add noise, too. Then use a texture that has dark green slope accents, this should color the trees. Don't use a perfectly flat terrain for the ground level, make a mountain terrain, enlarge it, smooth it and flatten it. Put this UNDER your mountains so that it extends around the edges and blends one mountain into another. This should more or less replace your ground plane. Also, play around with the ambience/shadow settings. Mountains are big and make big shadows. Adjusting ambience can help with the shadows. One final hint: Buy a book with photographs of mountains. Have it in front of you when you attempt to make a mountainous Bryce scene. Source material ALWAYS helps. For mountain photos, you can't do better than Ansel Adams. Hope this helps. -ScottK