I generated a terrain with zylann's height map plugin. So the terrain generated by heightmap is visible, and using that plugin I also exported a mesh, which I made invisible as I only use it to generate a navmesh. Everything works well, but now I want to exclude the river part from navigation mesh (don't want my units walking under water). I wanted to do so by removing vertices in base mesh in blender, but I can't as it is saved in .tres/.mesh file, which blender can't open. And there isn't any compatible format. Is there a way to export mesh from godot to blender, or is there another way to achieve exclusion of river part from navmesh generation?