1 files changed, 5 insertions, 1 deletions

diff --git a/js/panels/Materials/materials-popup.reel/materials-popup.js b/js/panels/Materials/materials-popup.reel/materials-popup.js
index 193e72b7..b44761bc 100755
--- a/js/panels/Materials/materials-popup.reel/materials-popup.js
+++ b/js/panels/Materials/materials-popup.reel/materials-popup.js
@@ -214,7 +214,11 @@ exports.MaterialsPopup = Montage.create(Component, {
                 enumerable: true,
                 value: function(materialID)
                 {
-           this._materialName = materialID;
+            // Note that setting Array.length = 0 will empty arrays,
+            // which is fine if you use getMaterialData to get a new array, but not for the
+            // dummyData arrays.
+            this._materialsData.length = 0;
+            this._materialName = materialID;
             if(
                                         (materialID ===  "UberMaterial")                                ||
                                         (materialID ===  "FlatMaterial")                                ||