Current questions and answers regarding the map editor.

Here are the xdb and dds files in the archive.
And I had to slightly increase the texture size to 240x180, adding empty areas to the right and bottom of it, so that it loads correctly.

Excellent! Thank you! I've finished my first mod, which adds new arenas. Should I publish it in the MODS thread for Heroes of Might and Magic 5: "Tribes of the East"? Or in the maps section?

And my imagination suggests: is it possible to slightly change the gameplay on the arena? For example, 1) add an object, approaching which any creature receives a random blessing or curse once per battle? 2) add several stacks of specific creatures to the battlefield, which would be neutral and fight against both players?
I suspect that this can be scripted, but, as far as I know, the scripts for battles are different from those for the global map.
Here, I found AddCreature(side, type, number, x = -1, y = -1); But this is only for one or the other player. And, I confess, I have never written scripts for tactical mods. I don't even know where to write them.