diff --git a/client/index.js b/client/index.js
index 8b0e73a..10fae85 100644
--- a/client/index.js
+++ b/client/index.js
@@ -45,6 +45,7 @@ stage.addChild(roomView);
 const worldTime = new WorldTime();
 let lastWorldTime = worldTime.humanReadable();
 // Synchronize state.
+let state = undefined;
 const stateSynchronizer = new StateSynchronizer({
   room,
   worldTime,
@@ -160,6 +161,8 @@ const predictionHandle = setInterval(() => {
   }
   // Tick synchronized.
   stateSynchronizer.tick(elapsed);
+  dirty = dirty || stateSynchronizer.state !== state;
+  state = stateSynchronizer.state;
   // Apply environmental lighting.
   stage.removeAllFilters();
   let intensity = 0;