Your tiles works fine for me Rastar, i don’t know why mine aren’t… It was fine with World composition.
i use 505 res tiles (since my world is very big) but i always end up with weird numbers.
My total res is around 36kx36k but in the import tool, the auto detect display 3 options, ≈120kx10k, ≈10kx120k, and the right one.
If i import with the auto detect unchanged (120kx10k) the tool process with no issue at all but obviously the result isn’t good, if i try to change between the 3 options to select the correct one, the preview disappear and theengine crash at import.
At first i thought it was because of a memory issue and i tried to import only 4 tiles of this big world. Well… The problem is still there even with only 4 tiles T_T. If you can try my files : Here
I’m using World Creator, so… If somebody can try it and confirm there is no issue ?