can I ask where you got those big sheets printed?

They were printed here in San Antonio, by a specialist in large scale photographic prints before my arrival. They were printed on 100% cotton rag as thick as cardboard. I'll get more precise details this evening. The Guadalupe Cultural Arts Center had them printed from my .ai files by a local printer. The surface looks like a very high resolution inkjet prints. The colors are crisp and vibrant.

wow, I don't think we have any of that stuff over here, A3 will have to do.