Photorealistic printed rock structures for demanding model layouts/dioramas. Using these special printed rock structures and the "wrinkling" technique, you can quickly produce astonishingly realistic rock formations, even entire rock faces, using a lightweight building method. The characteristics of Wrinkle Rocks: Lightweight: The alternative to heavy plaster surfaces! Fast: Wrinkle, fit in place, ready! Impressive: Instant colour and rock structure - amazingly natural effect!