diff --git a/src/experimental/note.md b/src/experimental/note.md
index 4910271c..bae9e273 100644
--- a/src/experimental/note.md
+++ b/src/experimental/note.md
@@ -8,4 +8,5 @@ new:
 - surface/sf_cylinder?
 - noise/worley_sphere?
 - voronoi/vrn_sphere?
-- t3d - roll/pitch/forward
\ No newline at end of file
+- t3d - roll/pitch/forward
+- polyline_join: doc multi-childs
\ No newline at end of file