From 50ea593a096eec7dc5a120189cd8b5132617bcf6 Mon Sep 17 00:00:00 2001
From: Matthew Petroff <matthew@mpetroff.net>
Date: Wed, 18 Nov 2020 11:44:41 -0500
Subject: [PATCH] Fix bug in multires performance improvements (fixes #935).

This seems to be caused by a race condition, but adding a check to make sure
the node is defined seems to fix it.
---
 src/js/libpannellum.js | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/js/libpannellum.js b/src/js/libpannellum.js
index b240b54..2d1027d 100644
--- a/src/js/libpannellum.js
+++ b/src/js/libpannellum.js
@@ -1278,8 +1278,10 @@ function Renderer(container) {
                 }
                 var node = texturesLoading[path];
                 delete texturesLoading[path];
-                node.texture = texture;
-                node.textureLoaded = loaded ? 2 : 1;
+                if (node !== undefined) {
+                    node.texture = texture;
+                    node.textureLoaded = loaded ? 2 : 1;
+                }
             });
         };
         processNextTile = function(node) {