Model talus (rock debris) wherever you create rock faces, outcroppings and or road cuts. Intermix grades and blend shades for the most realism. Color Natural Talus with Earth Colors™ Liquid Pigment, if desired. Sprinkle Talus and secure with Scenic Cement™ (S191). Purchase The Complete Guide to Model Scenery for additional information about how to use the Landscape System.Particle size as follows: Fine: 1/32"-3/32", Medium: 1/32"-3/16", Coarse: 3/16"-3/8" and Extra Coarse: 3/16"-1/2"