update to new shadow method API

available since blender 3.0. restores compatibility with blender 4.3.
fixes #253

Author: Richardn2002

io_ogre/ogre/material.py

@@ -133,7 +133,7 @@ def generate(self):
 
         self.generate_header()
         with self.w.iword('material').word(self.material_name).embed():
-            if self.material.shadow_method != "NONE":
+            if self.material['visible_shadow']:
                 self.w.iline('receive_shadows on')
             else:
                 self.w.iline('receive_shadows off')

io_ogre/util.py

@@ -579,6 +579,8 @@ def objects_merge_materials(objs):
     materials = set()
     for obj in objs:
         for mat in obj.data.materials:
+            # adapt to Blender API change: https://developer.blender.org/docs/release_notes/4.2/eevee/#shading-modes
+            mat['visible_shadow'] = obj.visible_shadow
             materials.add(mat)
     return materials