Hi Toykraftent, this does indeed sound like a fun project. I have a couple of questions to add to Torstan's: are you looking for earth world maps or fictitous ones? And what style are you looking for? Should it be terrain-heavy or more a Political atlas? Also, I wonder which projection would have to be used for literal stretching into a sphere. Does your process guarantee an even stretch of the image when you form the pvc sheet into a hemisphere?