Rebecca Buck, Osprey Studios. Published November 5, 2015 at 3558 × 2566 in How to Coil-build with clay from small to monumental. ← Previous Next → Mynydd Mawr, Tumble, nearly complete. Larger sculptures are always built from a scale model. The internal support walls are worked out in advance and the cutting of sections planned so that those walls will support the section’s shape during firing.