You may need to adjust the effects, you know the Ambience, difuse, you can do it in both of the materials if you used mixed materials, also if it is just one material, adding the sparkles could be small lights, of a .jpg material applied to the terrain for sand. Hope this gives you more options, if you haven't tried this yet....you could always go to Varian's site, he has some material you could mix and match, or decrease the size of your material used...Sharen