Fix stale packed textures in summit marker export

scripts/export-summit-plateau.py

@@ -15,6 +15,16 @@ for obj in [marker,*marker.children_recursive]:obj.select_set(True)
 bpy.context.view_layer.objects.active=marker
 location=marker.location.copy();marker.location=(0,0,0)
 photo_body=bpy.data.objects.get('Photo matched summit boulder')
+# Repacking an already-packed image after baking can retain its old PNG bytes.
+# Refresh from the saved bake before glTF copies those bytes into the GLB.
+if photo_body and photo_body.get('paintedInscription'):
+    images={n.image for mat in photo_body.data.materials for n in mat.node_tree.nodes
+            if n.type=='TEX_IMAGE' and n.image and n.image.filepath}
+    for image in images:
+        path=Path(bpy.path.abspath(image.filepath))
+        data=path.read_bytes()
+        image.pack(data=data,data_len=len(data))
+        image.reload()
 restore=None
 if photo_body and not photo_body.get('paintedInscription'):
     mat=photo_body.data.materials[0]