diff --git a/presentation/modules/this_method.tex b/presentation/modules/this_method.tex
index f396ff7..a78535f 100644
--- a/presentation/modules/this_method.tex
+++ b/presentation/modules/this_method.tex
@@ -29,6 +29,10 @@
     \input{presentation/diagrams/edge_sampling}
 \end{frame}
 
+\begin{frame}{Edge sampling - half spaces}
+    
+\end{frame}
+
 \subsection{conclusion - what can this method do?}
 % talk about limitations here!