Take the H*.pcx tile, edit it as you wish, but remember the basic texture tile rules of F4 world (which I'm not going to repeat here, they are all listed in the wiki, however if you specifically ARE looking for that info, sort of "hold my hand and walk me through" I can do that too), then remember to delete the M and L tiles, then resize the H tile down to these two deleted tiles, ie M*.pcx and L*.pcx with the proper resolution (or if you're totally lazy just edit the H one, but the far horizon images then come up with the old unedited tiles).
Then run seasonswitcher... hmm or if you edited the DDS files directly then you dont need to do even that, but most likely you are like me, work with PCX tiles as I have no dds converting stuff in my photoshop etc.
Anyways like I said in the first paragraph, if you need the hold hand walkthrough, just ask.
Can't wait to see your surprise
