1 files changed, 3 insertions, 0 deletions

diff --git a/js/lib/rdge/materials/z-invert-material.js b/js/lib/rdge/materials/z-invert-material.js
index 99b835b3..f1526b39 100644
--- a/js/lib/rdge/materials/z-invert-material.js
+++ b/js/lib/rdge/materials/z-invert-material.js
@@ -20,6 +20,9 @@ var ZInvertMaterial = function ZInvertMaterial() {
     this._time = 0.0;
     this._dTime = 0.01;
 
+    // array textures indexed by shader uniform name
+    this._glTextures = [];
+
         this.isAnimated                 = function()                    {  return true;                         };
         this.getShaderDef               = function()                    {  return zInvertMaterialDef;   };