RoughnessMipmapper: Fixed breakage when roughnessMap is undefined.

mrdoob · Aug 27, 2020 · ad7b747 · ad7b747
1 parent 7bf355c
commit ad7b747
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/examples/jsm/utils/RoughnessMipmapper.js b/examples/jsm/utils/RoughnessMipmapper.js
@@ -41,6 +41,8 @@ RoughnessMipmapper.prototype = {
 
 	generateMipmaps: function ( material ) {
 
+		if ( 'roughnessMap' in material === false ) return;
+
 		var { roughnessMap, normalMap } = material;
 
 		if ( roughnessMap === null || normalMap === null || ! roughnessMap.generateMipmaps || material.userData.roughnessUpdated ) return;