maintain texture parameters

examples/jsm/utils/RoughnessMipmapper.js

@@ -7,7 +7,6 @@
  */
 
 import {
-	LinearMipMapLinearFilter,
 	MathUtils,
 	Mesh,
 	NoBlending,
@@ -72,7 +71,7 @@ RoughnessMipmapper.prototype = {
 
 		if ( width !== roughnessMap.image.width || height !== roughnessMap.image.height ) {
 
-			var newRoughnessTarget = new WebGLRenderTarget( width, height, { minFilter: LinearMipMapLinearFilter, depthBuffer: false } );
+			var newRoughnessTarget = new WebGLRenderTarget( width, height, { wrapS: roughnessMap.wrapS, wrapT: roughnessMap.wrapT, magFilter: roughnessMap.magFilter, minFilter: roughnessMap.minFilter, depthBuffer: false } );
 
 			newRoughnessTarget.texture.generateMipmaps = true;