Does anyone know of a mod that will allow greater customization choices for terrain features and resource distribution? Obviously you get world age (old means flatter, young means hillier, more mountains), temperature (hot, normal, cold) water (wet, normal, dry) but the variation in each is fairly limited. Can anyone direct me to a way that I could, for example, create a map that was 66% desert but with 300% more oases? Or a map which had 300% more horses/cattle/sheep? Or a map that had only jungle and no forest? Things like that?