More realistic than paint! Use Earth Colors™ Liquid Pigment to color rocks, terrain and plaster castings by diluting and blending the water-soluble pigments in limitless combinations. Undercoat Pigment provides a base coat of color over white Plaster Cloth and other plaster products. This is the perfect base color under low ground covers, such as Fine and Blended Turf. Use full-strength or diluted.