Updated builds.

build/three.js

@@ -8996,8 +8996,9 @@
 			_lightPositionWorld = new Vector3(),
 
 			_MorphingFlag = 1,
+			_SkinningFlag = 2,
 
-			_NumberOfMaterialVariants = ( _MorphingFlag ) + 1,
+			_NumberOfMaterialVariants = ( _MorphingFlag | _SkinningFlag ) + 1,
 
 			_depthMaterials = new Array( _NumberOfMaterialVariants ),
 			_distanceMaterials = new Array( _NumberOfMaterialVariants ),
@@ -9031,6 +9032,7 @@
 		for ( var i = 0; i !== _NumberOfMaterialVariants; ++ i ) {
 
 			var useMorphing = ( i & _MorphingFlag ) !== 0;
+			var useSkinning = ( i & _SkinningFlag ) !== 0;
 
 			var depthMaterial = depthMaterialTemplate.clone();
 			depthMaterial.morphTargets = useMorphing;
@@ -9270,9 +9272,12 @@
 
 				}
 
+				var useSkinning = object.isSkinnedMesh;
+
 				var variantIndex = 0;
 
 				if ( useMorphing ) variantIndex |= _MorphingFlag;
+				if ( useSkinning ) variantIndex |= _SkinningFlag;
 
 				result = materialVariants[ variantIndex ];
 

build/three.module.js

@@ -8990,8 +8990,9 @@ function WebGLShadowMap( _renderer, _lights, _objects, capabilities ) {
 		_lightPositionWorld = new Vector3(),
 
 		_MorphingFlag = 1,
+		_SkinningFlag = 2,
 
-		_NumberOfMaterialVariants = ( _MorphingFlag ) + 1,
+		_NumberOfMaterialVariants = ( _MorphingFlag | _SkinningFlag ) + 1,
 
 		_depthMaterials = new Array( _NumberOfMaterialVariants ),
 		_distanceMaterials = new Array( _NumberOfMaterialVariants ),
@@ -9025,6 +9026,7 @@ function WebGLShadowMap( _renderer, _lights, _objects, capabilities ) {
 	for ( var i = 0; i !== _NumberOfMaterialVariants; ++ i ) {
 
 		var useMorphing = ( i & _MorphingFlag ) !== 0;
+		var useSkinning = ( i & _SkinningFlag ) !== 0;
 
 		var depthMaterial = depthMaterialTemplate.clone();
 		depthMaterial.morphTargets = useMorphing;
@@ -9264,9 +9266,12 @@ function WebGLShadowMap( _renderer, _lights, _objects, capabilities ) {
 
 			}
 
+			var useSkinning = object.isSkinnedMesh;
+
 			var variantIndex = 0;
 
 			if ( useMorphing ) variantIndex |= _MorphingFlag;
+			if ( useSkinning ) variantIndex |= _SkinningFlag;
 
 			result = materialVariants[ variantIndex ];