 			TEXTURE_FORMAT_TO_SAMPLER[FORMAT_COMPRESSED_ALPHA] 	= SamplerFormat.COMPRESSED_ALPHA;
 		}
 		
-		private var _texture		: Texture		= null;
-		private var _mipmap			: Boolean		= false;
-
-		private var _bitmapData		: BitmapData	= null;
-		private var _atf			: ByteArray		= null;
-		private var _atfFormat		: uint			= 0;
-		private var _format 		: String 		= FORMAT_BGRA;
-
-		private var _width			: Number		= 0;
-		private var _height			: Number		= 0;
-
-		private var _update			: Boolean		= false;
+		private var _texture		: Texture;
+		private var _mipmap			: Boolean;
+
+		private var _bitmapData		: BitmapData;
+		private var _atf			: ByteArray;
+		private var _atfFormat		: uint;
+		private var _format 		: String;
+
+		private var _width			: Number;
+		private var _height			: Number;
+
+		private var _update			: Boolean;
 
 		public function get format() : uint
 		{

	import aerys.minko.type.enum.SamplerFormat;
	
	import flash.display.BitmapData;
	import flash.display3D.Context3DTextureFormat;
	import flash.display3D.textures.Texture;
	import flash.display3D.textures.TextureBase;
	import flash.geom.Matrix;

			}
			
			if (_texture
				&& (_format	!= FORMAT_BGRA
					|| mipmap != _mipmap
					|| bitmapData.width != _width
					|| bitmapData.height != _height))
			{
