godot-docs/tutorials/3d/importing_3d_meshes.rst

Importing 3D meshes
===================

Introduction
------------

Godot supports a flexible and powerful [[3D Scene importer]], that
allows for full scene importing. For a lot of artists and developers
this is more than enough. However, many do not like this workflow as
much and prefer to import individual 3D Meshes and build the scenes
inside the Godot 3D editor themselves. (Note that for more advanced
features such as skeletal animation, there is no option to the 3D Scene
Importer).

The 3D mesh import workflow is simple and works using the OBJ file
format. The imported meshes result in a .msh binary file which the user
can put into a [[API:MeshInstance]], which in turn can be placed
somewhere in the edited scene.

Importing
---------

Importing is done through the Import 3D Mesh menu:

.. image:: /img/mesh_import.png

Which opens the Mesh import window:

.. image:: /img/mesh_dialog.png

This dialog allows the import of one more more OBJ files into a target
path. OBJ files are converted to .msh files. Files are imported without
any material on them, material has to be added by the user (see the
[[Fixed materials]] tutorial). If the external OBJ file is changed it
will be re-imported, while keeping the newly assigned material.

Options
-------

A few options are present. Normals is needed for regular shading, while
Tangents is needed if you plan to use normal-mapping on the material. In
general, OBJ files describe how to be shaded very well, but an option to
force smooth shading is available.

Finally, there is an option to weld vertices. Given OBJ files are
text-based, it is common to find some of these with vertices that do not
mach, which results in strange shading. The weld vertices option merges
vertices that are too close to keep proper smooth shading.

Usage
-----

Mesh resources (what this importer imports) are used inside MeshInstance
nodes. Simply set them to the Mesh property of them.

.. image:: /img/3dmesh_instance.png

And that is it.