diff --git a/examples/js/loaders/GLTFLoader.js b/examples/js/loaders/GLTFLoader.js
index bd8c0c86fb95a19420e4930a9d05997b23c5d9d3..b1449b751728eec6af096459fa6ce4493dd7f3bd 100644
--- a/examples/js/loaders/GLTFLoader.js
+++ b/examples/js/loaders/GLTFLoader.js
@@ -1910,7 +1910,7 @@ THREE.GLTFLoader = ( function () {
 				if ( bufferView !== null ) {
 
 					// Avoid modifying the original ArrayBuffer, if the bufferView wasn't initialized with zeroes.
-					bufferAttribute.setArray( bufferAttribute.array.slice() );
+					bufferAttribute = new THREE.BufferAttribute( bufferAttribute.array.slice(), bufferAttribute.itemSize, bufferAttribute.normalized );
 
 				}
 
diff --git a/examples/js/utils/BufferGeometryUtils.js b/examples/js/utils/BufferGeometryUtils.js
index 473d48661d36fbfcaf5dd848eca1821c06609180..5225b84ef4c151cea5e0d0132c52b3e4eacb26c6 100644
--- a/examples/js/utils/BufferGeometryUtils.js
+++ b/examples/js/utils/BufferGeometryUtils.js
@@ -589,19 +589,9 @@ THREE.BufferGeometryUtils = {
 
 			var name = attributeNames[ i ];
 			var oldAttribute = geometry.getAttribute( name );
-			var attribute;
 
 			var buffer = new oldAttribute.array.constructor( attrArrays[ name ] );
-			if ( oldAttribute.isInterleavedBufferAttribute ) {
-
-				attribute = new THREE.BufferAttribute( buffer, oldAttribute.itemSize, oldAttribute.itemSize );
-
-			} else {
-
-				attribute = geometry.getAttribute( name ).clone();
-				attribute.setArray( buffer );
-
-			}
+			var attribute = new THREE.BufferAttribute( buffer, oldAttribute.itemSize, oldAttribute.normalized );
 
 			result.addAttribute( name, attribute );
 
@@ -610,8 +600,10 @@ THREE.BufferGeometryUtils = {
 
 				for ( var j = 0; j < morphAttrsArrays[ name ].length; j ++ ) {
 
-					var morphAttribute = geometry.morphAttributes[ name ][ j ].clone();
-					morphAttribute.setArray( new morphAttribute.array.constructor( morphAttrsArrays[ name ][ j ] ) );
+					var oldMorphAttribute = geometry.morphAttributes[ name ][ j ];
+
+					var buffer = new oldMorphAttribute.array.constructor( morphAttrsArrays[ name ][ j ] );
+					var morphAttribute = new THREE.BufferAttribute( buffer, oldMorphAttribute.itemSize, oldMorphAttribute.normalized );
 					result.morphAttributes[ name ][ j ] = morphAttribute;
 
 				}
@@ -620,23 +612,7 @@ THREE.BufferGeometryUtils = {
 
 		}
 
-		// Generate an index buffer typed array
-		var cons = Uint8Array;
-		if ( newIndices.length >= Math.pow( 2, 8 ) ) cons = Uint16Array;
-		if ( newIndices.length >= Math.pow( 2, 16 ) ) cons = Uint32Array;
-
-		var newIndexBuffer = new cons( newIndices );
-		var newIndices = null;
-		if ( indices === null ) {
-
-			newIndices = new THREE.BufferAttribute( newIndexBuffer, 1 );
-
-		} else {
-
-			newIndices = geometry.getIndex().clone();
-			newIndices.setArray( newIndexBuffer );
-
-		}
+		// indices
 
 		result.setIndex( newIndices );
 
diff --git a/examples/jsm/loaders/GLTFLoader.js b/examples/jsm/loaders/GLTFLoader.js
index adf5cddce421260e275fc2dd78a99495cd0bcebb..c1ea344e49a5db0f2d71721f7607ddbedd0efe83 100644
--- a/examples/jsm/loaders/GLTFLoader.js
+++ b/examples/jsm/loaders/GLTFLoader.js
@@ -1974,7 +1974,7 @@ var GLTFLoader = ( function () {
 				if ( bufferView !== null ) {
 
 					// Avoid modifying the original ArrayBuffer, if the bufferView wasn't initialized with zeroes.
-					bufferAttribute.setArray( bufferAttribute.array.slice() );
+					bufferAttribute = new BufferAttribute( bufferAttribute.array.slice(), bufferAttribute.itemSize, bufferAttribute.normalized );
 
 				}
 
diff --git a/examples/jsm/utils/BufferGeometryUtils.js b/examples/jsm/utils/BufferGeometryUtils.js
index 3b3d8f954f8da6fa8f3a0e229010f737b0ef639f..9e86d9b2c438533f0d5641ea60ff26f701c009bb 100644
--- a/examples/jsm/utils/BufferGeometryUtils.js
+++ b/examples/jsm/utils/BufferGeometryUtils.js
@@ -598,19 +598,9 @@ var BufferGeometryUtils = {
 
 			var name = attributeNames[ i ];
 			var oldAttribute = geometry.getAttribute( name );
-			var attribute;
 
 			var buffer = new oldAttribute.array.constructor( attrArrays[ name ] );
-			if ( oldAttribute.isInterleavedBufferAttribute ) {
-
-				attribute = new BufferAttribute( buffer, oldAttribute.itemSize, oldAttribute.itemSize );
-
-			} else {
-
-				attribute = geometry.getAttribute( name ).clone();
-				attribute.setArray( buffer );
-
-			}
+			var attribute = new BufferAttribute( buffer, oldAttribute.itemSize, oldAttribute.normalized );
 
 			result.addAttribute( name, attribute );
 
@@ -619,8 +609,10 @@ var BufferGeometryUtils = {
 
 				for ( var j = 0; j < morphAttrsArrays[ name ].length; j ++ ) {
 
-					var morphAttribute = geometry.morphAttributes[ name ][ j ].clone();
-					morphAttribute.setArray( new morphAttribute.array.constructor( morphAttrsArrays[ name ][ j ] ) );
+					var oldMorphAttribute = geometry.morphAttributes[ name ][ j ];
+
+					var buffer = new oldMorphAttribute.array.constructor( morphAttrsArrays[ name ][ j ] );
+					var morphAttribute = new BufferAttribute( buffer, oldMorphAttribute.itemSize, oldMorphAttribute.normalized );
 					result.morphAttributes[ name ][ j ] = morphAttribute;
 
 				}
@@ -629,23 +621,7 @@ var BufferGeometryUtils = {
 
 		}
 
-		// Generate an index buffer typed array
-		var cons = Uint8Array;
-		if ( newIndices.length >= Math.pow( 2, 8 ) ) cons = Uint16Array;
-		if ( newIndices.length >= Math.pow( 2, 16 ) ) cons = Uint32Array;
-
-		var newIndexBuffer = new cons( newIndices );
-		var newIndices = null;
-		if ( indices === null ) {
-
-			newIndices = new BufferAttribute( newIndexBuffer, 1 );
-
-		} else {
-
-			newIndices = geometry.getIndex().clone();
-			newIndices.setArray( newIndexBuffer );
-
-		}
+		// indices
 
 		result.setIndex( newIndices );