I would like the forest, hill, and mountain autotiles to function the same way on the worldmap that other autotiles function in other types (exterior, interior, dungeon) of maps. What I mean is...by default, they correctly paint over the light grass A2 tile, but if I use one of the darker shades of grass as my A2 base, then the forest/hill/mountain autotiles paint over it with the (wrong) base light grass underneath. In a regular exterior map for example, this phenomenon doesn't happen - I can first put down some A2 grass tiles, then I can put down another A2 tile like dirt or stone, and then I can place other autotiles (thick grass, fences, etc.) over this seemlessly. How can I do this with autotiles on the worldmap?
Would I have to change the worldmap tileset type from "field type" to "area type?" And if I do this, are there any drawbacks or functionalities I would lose on the world map if I make that change? Thank you in advance for any help with this!