I made a mistake; I'm correcting it. Obstacles have their own coordinate system. Here is the diagram:

This is a very useful diagram: it clearly shows what's what. Thank you so much.

Now, to complete everything, I need to create previews for my arenas, but there are several problems with this. I installed paint.net to create an image in DDS format. But it remains unclear what should be written in the XDB file. As an example, I took the XDB file from abyss.

1) The first thing is clear: the link to the TGA. But at this address, I didn't find any TGA files. Moreover, there isn't even a DM_wait folder in the UI folder for some reason.
2) Second: the link to the DDS.
3) And all other items, except width and height, require explanation.
You suggested saving DDS in DXT1 format without mipmaps. But here, a certain TF_8888 format is specified, and there is 1. What does this mean? If I save it in the format you suggested, how should I write it? 0 and DXT1? Or should there be an underscore before the 1 in DXT_1? I hope for explanations of all points in the XDB file)