So, guess what happened.
There was this nice map on the STEX.  It was called Eaton, you see.
I did what you'd normally do to get an image file (it was a .jpg) into the game, and it worked out fine...well, mostly.
(https://www.sc4devotion.com/forums/proxy.php?request=http%3A%2F%2Fi30.tinypic.com%2F9h4d4w.png&hash=3de47fc26f681d1ec67fa20df8ca623578894091)
Ah, see?  There's this weird grid pattern on my region now.  It really is there, it's caused by a slight depression on the borders of each map.  Eh.  I Don't want to flatten out every tile on the region.  The region's massive!  I took a look at the JPG file, and there's no odd grid pattern there.  So, uh, how about some help?