Hello, I downloade your tool.
First of all, thank you for it, it looks great!
Just a piece of feedback: I am exporting the png, and some tiles are a little bit blended with each other, so I end up with some 1px black borders showing up when using tiles that are shorter, for example.
I can send you screenshots if you want, just let me know. Also, maybe is just something I am missing about the way to work with isometric tilesets?
I looked at the godot project, but I am a bit lost still :)