From 7358766d4d7e5324c3b75f031feceec2eefcb96f Mon Sep 17 00:00:00 2001
From: Bryan Housel <bryan@mapbox.com>
Date: Thu, 30 Mar 2017 00:37:11 -0400
Subject: [PATCH] Don't update hash, imagery_used when changing background in
 walkthrough (closes #3936)

---
 modules/renderer/background.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/modules/renderer/background.js b/modules/renderer/background.js
index 063f1d6b0..a09237b22 100644
--- a/modules/renderer/background.js
+++ b/modules/renderer/background.js
@@ -47,6 +47,8 @@ export function rendererBackground(context) {
 
 
     background.updateImagery = function() {
+        if (context.inIntro()) return;
+
         var b = background.baseLayerSource(),
             o = overlayLayers
                 .filter(function (d) { return !d.source().isLocatorOverlay(); })