diff --git a/examples/testbed/framework/sphere_mesh.h b/examples/testbed/framework/sphere_mesh.h
index f4c007b..7f26b56 100644
--- a/examples/testbed/framework/sphere_mesh.h
+++ b/examples/testbed/framework/sphere_mesh.h
@@ -45,6 +45,7 @@ struct smMesh
 };
 
 // Create a unit icosphere given the number of subdivisions.
+// If the number of subdivisions to perform is zero then the output mesh is an octahedron.
 void smCreateMesh(smMesh& output, u32 subdivisions);
 
 #endif 
\ No newline at end of file