blender: Fix incompatibilities with Blender 4

The Principled BSDF node was updated and some inputs, such as Specular
and Sheet Tint are no longer present. Instead, there is IOR Level, which
is set to 0 to achieve in-game look.

speedtools/blender/io_nfs4_import.py

@@ -45,6 +45,8 @@
 logger.setLevel(logging.INFO)
 logger.addHandler(logging.StreamHandler())
 
+major_version, _, _ = bpy.app.version
+
 
 bl_info = {
     "name": "Import NFS4 Track",
@@ -136,9 +138,13 @@ def _make_material(self, ext_resource: ExtendedResource) -> bpy.types.Material:
         image_texture.image = image  # type: ignore[attr-defined]
         image_texture.extension = "EXTEND"  # type: ignore[attr-defined]
         bsdf = node_tree.nodes["Principled BSDF"]
-        bsdf.inputs["Specular"].default_value = 0  # type: ignore[attr-defined]
+        if major_version == 3:
+            bsdf.inputs["Specular"].default_value = 0  # type: ignore[attr-defined]
+            bsdf.inputs["Sheen Tint"].default_value = 0  # type: ignore[attr-defined]
+        else:
+            # IOR Level
+            bsdf.inputs[12].default_value = 0  # type: ignore[attr-defined]
         bsdf.inputs["Roughness"].default_value = 1  # type: ignore[attr-defined]
-        bsdf.inputs["Sheen Tint"].default_value = 0  # type: ignore[attr-defined]
         self._link_texture_to_shader(node_tree=node_tree, texture=image_texture, shader=bsdf)
         output_socket = self._set_blend_mode(
             node_tree=node_tree,