Our rock troll sculptures (like most of our sculptures) begin with a flat cardboard Silhouette, crumpled newspaper and blue tape begins to bring shape to the 3-D structure, followed by a layer of papier-mâché. Spray foam insulation is added and carved into the detail shapes when cured. Finally, a coat of paper clay (toilet paper, PVA (white) glue and wall board gypsum mixed in a food processor) cover the sculpture and when dry get paint and clothes!