diff --git a/Tools/ModelTranslator/bl_bake.py b/Tools/ModelTranslator/bl_bake.py
index 5ee7743b..4d3ff185 100644
--- a/Tools/ModelTranslator/bl_bake.py
+++ b/Tools/ModelTranslator/bl_bake.py
@@ -103,8 +103,13 @@ def _rewire_emit(mat, input_name, warnings):
         else:
             v = sock.default_value
             if isinstance(v, float):
+                # 该通道无贴图，把常量值直接烘入
+                warnings.append("%s.%s 无贴图，(常量) %.3f 烘入" % (mat.name, input_name, v))
                 emit.inputs['Color'].default_value = (v, v, v, 1.0)
             else:  # Base Color 是 4 分量
+                # 该通道无贴图，把常量色直接烘入
+                warnings.append("%s.%s 无贴图，(常量色 %.3f/%.3f/%.3f) 烘入"
+                                % (mat.name, input_name, v[0], v[1], v[2]))
                 emit.inputs['Color'].default_value = (v[0], v[1], v[2], 1.0)
     for l in list(out.inputs['Surface'].links):
         nt.links.remove(l)
diff --git a/Tools/ModelTranslator/bl_decimate.py b/Tools/ModelTranslator/bl_decimate.py
index f1a68209..afc4259e 100644
--- a/Tools/ModelTranslator/bl_decimate.py
+++ b/Tools/ModelTranslator/bl_decimate.py
@@ -104,11 +104,16 @@ def main():
             cur = len(obj.data.polygons)
             if within_tolerance(target, cur) or cur <= target:
                 break
+        # 重试用尽仍超差且偏多：记录警告，交由上层决定是否可接受
+        if not within_tolerance(target, cur) and cur > target:
+            warnings.append("修正 %d 轮后仍超差：%d 面（目标 %d ±3%%）" % (MAX_RETRY, cur, target))
 
     _smart_unwrap(obj)
     out_dir = os.path.dirname(os.path.abspath(out_fbx))
     os.makedirs(out_dir, exist_ok=True)
-    bpy.ops.export_scene.fbx(filepath=out_fbx, path_mode='STRIP', embed_textures=False)
+    # 仅导出合并后的对象；整场景导出会把 armature/empty 等非 mesh 带进 _low.fbx
+    bpy.ops.export_scene.fbx(filepath=out_fbx, use_selection=True,
+                             path_mode='STRIP', embed_textures=False)
 
     print("MT_SUMMARY " + json.dumps(
         {"src": os.path.basename(src), "fbx": os.path.basename(out_fbx),
diff --git a/Tools/ModelTranslator/model_decimate.py b/Tools/ModelTranslator/model_decimate.py
index 4c3d9d1c..71d7ae3b 100644
--- a/Tools/ModelTranslator/model_decimate.py
+++ b/Tools/ModelTranslator/model_decimate.py
@@ -13,6 +13,8 @@ def main():
     ap.add_argument("-o", "--out", default=None, help="输出目录（默认源文件同目录）")
     ap.add_argument("--blender", default=None)
     args = ap.parse_args()
+    if args.tris <= 0:
+        ap.error("--tris 必须为正整数")
 
     blender = find_blender(args.blender)
     name = os.path.splitext(os.path.basename(args.input))[0]