diff --git a/code/map_data_debug.js b/code/map_data_debug.js
index 0aff2b37..88f70494 100644
--- a/code/map_data_debug.js
+++ b/code/map_data_debug.js
@@ -3,7 +3,7 @@
 
 
 window.RenderDebugTiles = function() {
-  this.CLEAR_CHECK_TIME = 0.25;
+  this.CLEAR_CHECK_TIME = 0.5;
   this.FADE_TIME = 2.0;
 
   this.debugTileLayer = L.layerGroup();
@@ -57,6 +57,7 @@ window.RenderDebugTiles.prototype.setState = function(id,state) {
     case 'request-fail': col='#a00'; fill='#666'; break;
     case 'tile-fail': col='#f00'; fill='#666'; break;
     case 'tile-timeout': col='#ff0'; fill='#666'; break;
+    case 'render-queue': col='#f0f'; fill='#f0f'; break;
   }
   this.setColour (id, col, fill);
   if (clearDelay >= 0) {