From d736c5e4fac0813fa925d7538a3c7ca28d8b17a6 Mon Sep 17 00:00:00 2001
From: "Mr.doob" <info@mrdoob.com>
Date: Fri, 24 Jul 2015 23:18:02 -0400
Subject: [PATCH] WebGLRenderer: Do not upload MorphTargets with 0 influence.

---
 src/renderers/WebGLRenderer.js | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/src/renderers/WebGLRenderer.js b/src/renderers/WebGLRenderer.js
index c28336a55c..4dd4b34760 100644
--- a/src/renderers/WebGLRenderer.js
+++ b/src/renderers/WebGLRenderer.js
@@ -1051,11 +1051,16 @@ THREE.WebGLRenderer = function ( parameters ) {
 				var influence = activeInfluences[ i ];
 				morphInfluences[ i ] = influence[ 0 ];
 
-				var attribute = geometry.morphAttributes[ influence[ 1 ] ];
 
-				objects.updateAttribute( attribute );
+				if ( influence[ 0 ] !== 0 ) {
 
-				geometry.addAttribute( 'morphTarget' + i, attribute );
+					var attribute = geometry.morphAttributes[ influence[ 1 ] ];
+
+					objects.updateAttribute( attribute );
+
+					geometry.addAttribute( 'morphTarget' + i, attribute );
+
+				}
 
 			}
 
-- 
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