No. Look at the maps. Cities, bridges, trees, etc. would be upside-down.
I hadn't considered these things. Dwi was made with copy-pasting, though, so I guess that could of been done to fix the issue. But then, you are right, it wouldn't be so trivial.
North is pretty much established as up, but I see east and west confused so often that I'm not sure flipping Dwilight horizontally would not actually conform with a majority of the RPs!
Really? I haven't... Indeed, I've seen West and East used abundantly (and correctly).
Wow, it is amazing how different that makes that feel.
Indeed, it does take little to make maps feel completely different.
But we roleplay the north as having the coldest regions so if your rule of first roleplay applies that would but Dwilight in the north.
Then northern hemisphere. Still more South then BT and AT, though. I'm thinking Madina could be at the equator. Or Luria, depending on how big the game world planet is (deserts are usually a little above and below the equator, not on it, and caused by cold streams in hot regions notably).
Not sure how the southerners RPed winters, I know I always saw D'Hara's weather to mostly be like Italy's.