Well almost... After months of trial and error, I have figured out the proper image & tiling configuration to get a single image material file, in the Cities XXL map editor, to use for game maps. (see the image below). Now...How to get a clear image? Maybe some of you Photo Shop gurus can give me some ideas. The map editor uses a 512 x 512 .png for textures. The "map size" in the editor is 4096 x 4096, same as the in-game maps. My Google Map screen grabs are around 1024 x 1024 (72 pixels per inch). I get too much blur when I resize to 512 x 512. Then, the map editor seems to stretch the image, causing even more blur. The map editor will accept a 1024 x 1024 .png, but the results are near identical to using a 512 x 512 .png.