I can't find it. I've been looking at Barry's overhead view of /mine and I'm not sure one was generated this reset (and it was pretty well confirmed that there wasn't one before). That would make /main the only place to find wild red sand and red sandstone. If someone could send me coords to a mesa biome in /mine I'd be very appreciative; failing that, adding a custom recipe for red sand would be very helpful. EDIT: Scrolling through the custom recipes thread, I found BarryX's suggestion for a red sand recipe, but it doesn't seem to have been implemented. If there is no renewable method for red sand, maybe this is worth another look.