diff --git a/README.md b/README.md
index 2e52c627..af8cebb1 100644
--- a/README.md
+++ b/README.md
@@ -364,6 +364,8 @@ These examples incubate dotSCAD and dotSCAD refactors these examples. See [examp
 [**surface/sf_curve**(levels, curve_path, ...)](https://openhome.cc/eGossip/OpenSCAD/lib3x-sf_curve.html) | curve a photo.
 [**surface/sf_splines**(ctrl_pts, row_spline, column_spline)](https://openhome.cc/eGossip/OpenSCAD/lib3x-sf_splines.html) | generalized-spline surface.
 [**surface/sf_thicken**(points, thickness, ...)](https://openhome.cc/eGossip/OpenSCAD/lib3x-sf_thicken.html) | thicken a surface.
+**surface/sf_solidifyT**(points1, points2, triangles) | solidify two triangulated surfaces.
+**surface/sf_thickenT**(points, thickness, ...) | thicken a triangulated surface.
 
 ## Triangle