From c82ff84a51f61133efc1ae28b36f5eacd3e3ca8a Mon Sep 17 00:00:00 2001
From: "Mr.doob" <info@mrdoob.com>
Date: Tue, 25 Aug 2015 16:51:21 -0700
Subject: [PATCH] WebGLRenderer: Handle missing morphTargets/morphNormals a bit
 better.

---
 src/renderers/WebGLRenderer.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/renderers/WebGLRenderer.js b/src/renderers/WebGLRenderer.js
index d69a38b8b9..ce1bc0d03e 100644
--- a/src/renderers/WebGLRenderer.js
+++ b/src/renderers/WebGLRenderer.js
@@ -808,8 +808,8 @@ THREE.WebGLRenderer = function ( parameters ) {
 
 					var index = influence[ 1 ];
 
-					if ( material.morphTargets === true ) geometry.addAttribute( 'morphTarget' + i, morphAttributes.position[ index ] );
-					if ( material.morphNormals === true ) geometry.addAttribute( 'morphNormal' + i, morphAttributes.normal[ index ] );
+					if ( material.morphTargets === true && morphAttributes.position ) geometry.addAttribute( 'morphTarget' + i, morphAttributes.position[ index ] );
+					if ( material.morphNormals === true && morphAttributes.normal ) geometry.addAttribute( 'morphNormal' + i, morphAttributes.normal[ index ] );
 
 				} else {
 
-- 
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