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Merge pull request #6441 from Calinou/surfacetool-tangents-normalmap

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Document tangents being required for normal maps in Using the SurfaceTool
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Max Hilbrunner
2022-12-01 16:10:13 +01:00
committed by GitHub
parent 1e2f11fbc3 81908bf0f4
commit 64b734a8fc
1 changed files with 6 additions and 2 deletions
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tutorials/3d/procedural_geometry/surfacetool.rst
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@@ -92,8 +92,12 @@ be called after generating geometry and before committing the mesh using ``commi
``commit_to_arrays()``. Calling ``generate_normals(true)`` will flip the resulting normals. As a side
note, ``generate_normals()`` only works if the primitive type is set to ``Mesh.PRIMITIVE_TRIANGLES``.
If you don't add custom tangents, they can be added with ``generate_tangents()``, but it requires
that each vertex have UVs and normals set already.
You may notice that normal mapping or other material properties look broken on
the generated mesh. This is because normal mapping **requires** the mesh to
feature *tangents*, which are separate from *normals*. You can either add custom
tangents manually, or generate them automatically with with
``generate_tangents()``. This method requires that each vertex have UVs and
normals set already.
.. tabs::
.. code-tab:: gdscript GDScript