adding notes

mrdoob · Jan 26, 2021 · 65d597d · 65d597d
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diff --git a/examples/js/loaders/GLTFLoader.js b/examples/js/loaders/GLTFLoader.js
@@ -620,6 +620,7 @@ THREE.GLTFLoader = ( function () {
 
 				var scale = extension.clearcoatNormalTexture.scale;
 
+				// https://github.com/mrdoob/three.js/issues/11438#issuecomment-507003995
 				materialParams.clearcoatNormalScale = new THREE.Vector2( scale, -scale );
 
 			}
@@ -2774,6 +2775,7 @@ THREE.GLTFLoader = ( function () {
 
 			pending.push( parser.assignTexture( materialParams, 'normalMap', materialDef.normalTexture ) );
 
+			// https://github.com/mrdoob/three.js/issues/11438#issuecomment-507003995
 			materialParams.normalScale = new THREE.Vector2( 1, -1 );
 
 			if ( materialDef.normalTexture.scale !== undefined ) {

diff --git a/examples/jsm/loaders/GLTFLoader.js b/examples/jsm/loaders/GLTFLoader.js
@@ -685,6 +685,7 @@ var GLTFLoader = ( function () {
 
 				var scale = extension.clearcoatNormalTexture.scale;
 
+				// https://github.com/mrdoob/three.js/issues/11438#issuecomment-507003995
 				materialParams.clearcoatNormalScale = new Vector2( scale, -scale );
 
 			}
@@ -2839,6 +2840,7 @@ var GLTFLoader = ( function () {
 
 			pending.push( parser.assignTexture( materialParams, 'normalMap', materialDef.normalTexture ) );
 
+			// https://github.com/mrdoob/three.js/issues/11438#issuecomment-507003995
 			materialParams.normalScale = new Vector2( 1, -1 );
 
 			if ( materialDef.normalTexture.scale !== undefined ) {