Copying this over here in case it's on RSO's End.

http://puu.sh/pOcw1/56976a1302.png

RSO should be spawning sand under sand resources.
Sand resource is not over every sand tile tho - it's still normally rolled.

yeah I generated a few maps and then just admin explored them, the few maps I was having issues with I was just getting unlucky, but it is spawning it around normally, so disregard this. Sorry, just wanted to make sure there wasn't something up, but an hour of testing and I determined it's just luck based. lol delete this thread.