I think it might be the brackets.
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Atleast thats the word i got about it in other thread. I had to reinstall my editor so i havent yet tried myself.
I would like to know myself since im planning a bit bigger map with a lot of streams and rivers and canyons and cliffs, generally similar to eastern parts of Luculla Forest and Phantom forest areas only more rugged.
Yep, perfect. Thanks!
Regarding the custom size squares, it seems a quick workaround is just a new terrain at whatever size fits (as doc said, it just didn't register fast enough -_-; thanks doc!). In my case, 15x15 worked. Though I'm not sure why the blood water has a green reflection (can't recall if that's part of it or the mountain affecting it..). And as doc said, make sure to AI Paint block it. Is there a way to update the AI grid without having to copy/paste every time? It keeps saving outside of the levels folder

..