Pedro Fonseca from Amistad de Monterrey in Mexico brings us this promising use of Coroplast (they actually used Trovicel).
This is a great way to add a more 3-d element to a very 2-d material. Imagine a bigger bend or a gap between the two stacked pieces.
They created 10 cubed towers on the sides, 4 double stacked towers, and one panel in the center. Then they lit them with LEF lights.
Materials: Trovicel (PVC foams)
Cost: Around 5,000 pesos ($430)