Results of "curved building panel modular foam" are not very good. This page gives some general ideas of curved architectural panels, and this page, Galileo, specifically calls for sandwich panels for this, but unfortunately it is European. Loxley provides many related solutions, but it is very difficult to find a real product for a low-budget project since the company is offshore. ThermaSpan residential has a metal and foam profile that matches imaginative ideas of colleagues of what a panel should be, but there is no picture of a curved panel, and the supplier is offshore. If the project were huge, then Radome might be the answer. Kalwall is a product that might be the answer, a real product that offers curves and light transmission. It has a person where the project is located, a spec, and systems applicable to walls and roofs. Todco can do almost anything in a curved panel, but apparently on a high budget. One of the approaches in mind at the outset of search was corrugated or honeycomb kraft.