The built-in Navmesh creation tool doesn't quite work for me, so I would like to create my own navmeshes in Blender based on the original terrain, and import it. However, importing just brings it in as a .msh file, and the NavigationMeshInstance node asks for a .tres NavigationMesh resource.
Can someone point me toward how to create a NavigationMesh resource from an imported mesh? I can't find anything in the documentation or here on the Q&A.
Thank you so much for your help!