feat: Blender 4.2 + legacy shader node group warning

src/io_scene_vrm/editor/mtoon1/migration.py

@@ -17,6 +17,7 @@
 from ...common.gl import GL_LINEAR, GL_NEAREST
 from ...common.logging import get_logger
 from ...common.progress import create_progress
+from .. import search
 from ..extension import get_material_extension
 from .property_group import (
     GL_LINEAR_IMAGE_INTERPOLATIONS,
@@ -88,6 +89,13 @@ def migrate_material(
     material: Material,
     blender_4_2_migrated_material_names: list[str],
 ) -> None:
+    _, legacy_vrm_shader_name = search.vrm_shader_node(material)
+    if legacy_vrm_shader_name in search.LEGACY_VRM_SHADER_NAMES:
+        # 古いシェーダーノードグループはそのままではBlender 4.2に未対応なので、
+        # Blender 4.2以降へのバージョンアップ時は必ず警告する
+        blender_4_2_migrated_material_names.append(material.name)
+        return
+
     if not material.use_nodes:
         return
     node_tree = material.node_tree

src/io_scene_vrm/editor/mtoon1/ops.py

@@ -1099,11 +1099,7 @@ def draw(self, _context: Context) -> None:
             + " to implement automatic migration of old settings values because those"
             + " values could no longer be read.\n"
             + 'Please check the "{alpha_mode}" settings for materials that have'
-            + " MToon enabled. "
-            + "Alternatively, if you open and save the \ncurrent file using the latest"
-            + " version of Blender 3.6 and the VRM add-on, the data for automatic"
-            + " migration will be created \ninternally, so that file can be opened in"
-            + " Blender 4.2 or later without losing the material settings.\n"
+            + " MToon enabled.\n"
             + "Materials that may be affected are as follows:"
         ).format(
             blend_mode=pgettext("Blend Mode"),

src/io_scene_vrm/editor/search.py

@@ -1,6 +1,6 @@
 from collections.abc import Sequence
 from dataclasses import dataclass
-from typing import Optional, Union
+from typing import Final, Optional, Union
 
 from bpy.app.translations import pgettext
 from bpy.types import (
@@ -70,6 +70,13 @@ def export_materials(context: Context, objects: list[Object]) -> list[Material]:
     return result
 
 
+LEGACY_VRM_SHADER_NAMES: Final = (
+    "MToon_unversioned",
+    "GLTF",
+    "TRANSPARENT_ZWRITE",
+)
+
+
 def vrm_shader_node(
     material: Material,
 ) -> tuple[Optional[ShaderNodeGroup], Optional[str]]:

src/io_scene_vrm/editor/validation.py

@@ -604,12 +604,6 @@ def detect_errors(
                     continue
 
                 links = node.inputs["Surface"].links
-                groups = [
-                    "MToon_unversioned",
-                    "GLTF",
-                    "TRANSPARENT_ZWRITE",
-                ]
-
                 if links and links[0].from_node.type == "BSDF_PRINCIPLED":
                     continue
 
@@ -619,7 +613,11 @@ def detect_errors(
                         from_node, ShaderNodeGroup
                     ):
                         node_tree = from_node.node_tree
-                        if node_tree and node_tree.get("SHADER") in groups:
+                        if (
+                            node_tree
+                            and node_tree.get("SHADER")
+                            in search.LEGACY_VRM_SHADER_NAMES
+                        ):
                             continue
 
                 skippable_warning_messages.append(

src/io_scene_vrm/locale/ja_jp.py

@@ -570,11 +570,7 @@
         + " to implement automatic migration of old settings values because those"
         + " values could no longer be read.\n"
         + 'Please check the "{alpha_mode}" settings for materials that have'
-        + " MToon enabled. "
-        + "Alternatively, if you open and save the \ncurrent file using the latest"
-        + " version of Blender 3.6 and the VRM add-on, the data for automatic"
-        + " migration will be created \ninternally, so that file can be opened in"
-        + " Blender 4.2 or later without losing the material settings.\n"
+        + " MToon enabled.\n"
         + "Materials that may be affected are as follows:",
     ): "Blender 4.2へのアップデートに伴い、一部のMToonマテリアルの"
     + "「{alpha_mode}」設定が意図せず「{transparent}」に変化している\n"
@@ -585,10 +581,6 @@
     + "されましたが、古い設定値の自動移行は、\n"
     + "古い設定値自体がもう読めないため実装が不可能でした。"
     + "MToonが有効なマテリアルの「{alpha_mode}」設定の確認をお願いします。\n"
-    + "あるいは、Blender 3.6とVRMアドオンの最新版で現在のファイルを"
-    + "一度開いて保存すると、内部的に自動移行用のデータが作成\n"
-    + "されるため、そのファイルはマテリアルの設定を失わずに"
-    + "Blender 4.2以降でも開けるようになります。\n"
     + "影響のある可能性のあるマテリアルは次の通りです。",
     (
         "Operator",

src/io_scene_vrm/locale/zh_hans.py

@@ -550,11 +550,7 @@
         + " to implement automatic migration of old settings values because those"
         + " values could no longer be read.\n"
         + 'Please check the "{alpha_mode}" settings for materials that have'
-        + " MToon enabled. "
-        + "Alternatively, if you open and save the \ncurrent file using the latest"
-        + " version of Blender 3.6 and the VRM add-on, the data for automatic"
-        + " migration will be created \ninternally, so that file can be opened in"
-        + " Blender 4.2 or later without losing the material settings.\n"
+        + " MToon enabled.\n"
         + "Materials that may be affected are as follows:",
     ): "升级到 Blender 4.2可能会无意间改变一些MOOT材质的"
     + "「{alpha_mode}」为「{transparent}」\n"
@@ -564,9 +560,5 @@
     + "但是无法自动迁移旧的配置 因为这些参数无法读取了\n"
     + "请检查材质「{alpha_mode}」设置中。"
     + "具有MToon启动\n"
-    + "或者，您可以使用最新版本的 Blender 3.6 和 VRM 插件将当前文件复制 "
-    + "打开并保存后，将在内部创建数据以进行自动迁移\n"
-    + "以便可以在Blender 4.2 或更高版本"
-    + "不会丢失材质设置\n"
     + "可能受影响的材质如下。",
 }