diff --git a/README.md b/README.md
index d0c085c6..56615582 100644
--- a/README.md
+++ b/README.md
@@ -351,6 +351,12 @@ These examples incubate dotSCAD and dotSCAD refactors these examples. See [examp
 
 # Preview
 
+## Surface
+
+ Signature | Description
+--|--
+[**surface/sf_curve**(levels, curve_path, ...) | curve a photo.
+
 ## Triangle
 
  Signature | Description