Woodland Scenics Rock Debris Talus Extra Coarse Brown everywhere there is a rock face an outcropping of rocks or a road cut there is rock debris of various sizes and shades. Talus is a lightweight material used for modeling rock debris. Just sprinkle on talus and secure with a 50/50 mixture of Scenic Cement and water. Intermix grades and blend shades for the most realism. Modify talus colors with Earth Colors Liquid Pigments if desired. 25 cu. in.