diff --git a/src/hub.html b/src/hub.html
index 276efb05f1484f55971cffc2f4c28d94488e3ead..e9533ed12e1632d65c796da95906092b17a0f2aa 100644
--- a/src/hub.html
+++ b/src/hub.html
@@ -26,6 +26,7 @@
         gamma-factor
         networked-scene="adapter: janus; audio: true; debug: true; connectOnLoad: false;"
         physics="gravity: -6; debug: false;"
+        tunneleffect="minRadius: 0.3"
         mute-mic="eventSrc: a-scene; toggleEvents: action_mute"
         freeze-controller="toggleEvent: action_freeze"
         personal-space-bubble="debug: false;"