I think that it would be very useful to be able to export regions to a .blend file.
Maybe rendering every block would work, or making a huge poly out of the region?

The map-tiles are already "poly meshes", saved as a gzip compressed json in this format: https://threejs.org/docs/index.html?q=buff#api/en/core/BufferGeometry
Converting them into .obj files should be easy if you have some JS knowledge and read into ThreeJS. Maybe there are even tools already for this.
And blender can import .obj files :)

BlueMap will not get a built-in exporter to different files, since this is way out of scope for a mapping tool ^^

This addon, and this video should do the trick.

Allright, thank you so much!

I'm just a blender noob :3

Tysm!