diff --git a/src/render/render.cpp b/src/render/render.cpp
index 3beb83d1..b3327ec0 100644
--- a/src/render/render.cpp
+++ b/src/render/render.cpp
@@ -56,7 +56,7 @@ Vector Camera::UnProjectPoint3(Vector p) const {
     Vector orig = offset.ScaledBy(-1);
     orig = orig.Plus(projRight.ScaledBy(p.x)).Plus(
                      projUp.   ScaledBy(p.y).Plus(
-                     projRight.Cross(projUp). ScaledBy(p.z)));
+                     projUp.Cross(projRight). ScaledBy(p.z)));
     return orig;
 }
 
diff --git a/test/constraint/pt_on_face/normal.png b/test/constraint/pt_on_face/normal.png
index 1258dcad..62080a07 100644
Binary files a/test/constraint/pt_on_face/normal.png and b/test/constraint/pt_on_face/normal.png differ
diff --git a/test/group/translate_asy/normal.png b/test/group/translate_asy/normal.png
index c889c07e..c9b4e4ec 100644
Binary files a/test/group/translate_asy/normal.png and b/test/group/translate_asy/normal.png differ