Migrate to Blender 5.0 API

- Replaced action.fcurves with channelbag system
- Updated EEVEE_NEXT to EEVEE render engine
- Removed deprecated material.use_nodes and use_shadeless
- Fixed bone selection/hide API for Pose mode

core/mmd/operators/material.py

@@ -386,7 +386,7 @@ class EdgePreviewSetup(Operator):
         return mat
 
     def __make_shader(self, m: Material) -> None:
-        m.use_nodes = True
+        # Note: material.use_nodes is deprecated in Blender 5.0 - materials always use nodes
         nodes, links = m.node_tree.nodes, m.node_tree.links
 
         node_shader = nodes.get("mmd_edge_preview", None)

core/mmd/operators/morph.py

@@ -475,7 +475,8 @@ class ViewBoneMorph(bpy.types.Operator):
         for morph_data in morph.data:
             p_bone: Optional[bpy.types.PoseBone] = armature.pose.bones.get(morph_data.bone, None)
             if p_bone:
-                p_bone.bone.select = True
+                # Blender 5.0: use pose bone select property directly
+                p_bone.select = True
                 mtx = (p_bone.matrix_basis.to_3x3() @ Quaternion(*morph_data.rotation.to_axis_angle()).to_matrix()).to_4x4()
                 mtx.translation = p_bone.location + morph_data.location
                 p_bone.matrix_basis = mtx
@@ -521,9 +522,10 @@ class ApplyBoneMorph(bpy.types.Operator):
                 item.bone = p_bone.name
                 item.location = p_bone.location
                 item.rotation = p_bone.rotation_quaternion if p_bone.rotation_mode == "QUATERNION" else p_bone.matrix_basis.to_quaternion()
-                p_bone.bone.select = True
+                # Blender 5.0: use pose bone select property directly
+                p_bone.select = True
             else:
-                p_bone.bone.select = False
+                p_bone.select = False
         logger.info(f"Applied current pose to bone morph: {morph.name}")
         return {"FINISHED"}
 

core/mmd/operators/view.py

@@ -32,16 +32,14 @@ class _SetShadingBase:
 
     @staticmethod
     def _reset_material_shading(context: Context, use_shadeless: bool = False) -> None:
-        for i in (x for x in context.scene.objects if x.type == "MESH" and x.mmd_type == "NONE"):
-            for s in i.material_slots:
-                if s.material is None:
-                    continue
-                s.material.use_nodes = False
-                s.material.use_shadeless = use_shadeless
+        # Note: material.use_nodes and material.use_shadeless are deprecated in Blender 5.0
+        # Materials always use nodes now, and shadeless is handled differently
+        # This method is kept for compatibility but no longer modifies materials
+        pass
 
     def execute(self, context: Context) -> Dict[str, str]:
-        context.scene.render.engine = "BLENDER_EEVEE_NEXT"
-        logger.debug(f"Setting render engine to BLENDER_EEVEE_NEXT")
+        context.scene.render.engine = "BLENDER_EEVEE"
+        logger.debug(f"Setting render engine to BLENDER_EEVEE")
 
         shading_mode: Optional[str] = getattr(self, "_shading_mode", None)
         for space in self._get_view3d_spaces(context):