diff --git a/data/tetrahedron.obj b/data/tetrahedron.obj
index 5ac91e3..64efd3a 100644
--- a/data/tetrahedron.obj
+++ b/data/tetrahedron.obj
@@ -1,8 +1,6 @@
-# Blender v2.79 (sub 0) OBJ File: ''
-# www.blender.org
 o Solid
 v 0.000000 0.769688 0.000000
-v 0.000000 0.000000 -0.769688
+v 0.000000 0.000000 0.769688
 v 0.769688 0.000000 0.000000
 v 0.000000 0.000000 0.000000
 s off