My brothers and I came up with a new variant for Settlers: The Settlers of Whoops, the Terraforming Plant went way out of Control over night. The land tiles represent simply land and all the resources are shuffled together face down. When you get resources you ignore the terrain and simply take the right number of resources.
Another variant we came up with is based on the same concepts but with land types bumpy and flat. The mountains hills and half of the forests (marked for identification) are bumpy while the plains, pastures and the other half of the forests are flat. When you take resources you simply take the right number of bumpy and flat resources since the brick, ore and half the wood are shuffled together in one pile with everything else in another pile.