diff --git a/src/hub.html b/src/hub.html
index c7d4a75626f4d27f2f29e60ee644d1b65430c66c..1059db2da8433409594227e3c8780fe9dd213cef 100644
--- a/src/hub.html
+++ b/src/hub.html
@@ -203,7 +203,7 @@
                     stretchable="useWorldPosition: true;"
                     hoverable
                     geometry="primitive: plane"
-                    material="side: double;"
+                    material="shader: flat; side: double;"
                     image-plus
                     sticky-object="autoLockOnLoad: true; autoLockOnRelease: true;"
                 >