Arun Sharma
Western Thunderer
Something like a roof design is readily 3D printed. Because, as you say, high definition 3D prints are not long term light stable, their shape lends themselves to be easily/readily used as masters for home polyester resin casting. The resultant product is both long lasting and pretty much impervious to any form of erosion/corrosion.I can't say, as I don't know about the long-term stability of the materials used in 3D printing.