GLTFLoader: Keep uvScaleMap updates backwards-compatible.

examples/js/loaders/GLTFLoader.js

@@ -760,10 +760,17 @@ THREE.GLTFLoader = ( function () {
 
 					}
 
+					var offset;
+					var repeat;
+
+					if ( uvScaleMap.matrix !== undefined ) {
+
+						// > r88.
+
 						if ( uvScaleMap.matrixAutoUpdate === true ) {
 
-						var offset = uvScaleMap.offset;
-						var repeat = uvScaleMap.repeat;
+							offset = uvScaleMap.offset;
+							repeat = uvScaleMap.repeat;
 							var rotation = uvScaleMap.rotation;
 							var center = uvScaleMap.center;
 
@@ -773,6 +780,17 @@ THREE.GLTFLoader = ( function () {
 
 						uniforms.uvTransform.value.copy( uvScaleMap.matrix );
 
+					} else {
+
+							// <= r87. Remove when reasonable.
+
+							offset = uvScaleMap.offset;
+							repeat = uvScaleMap.repeat;
+
+							uniforms.offsetRepeat.value.set( offset.x, offset.y, repeat.x, repeat.y );
+
+					}
+
 				}
 
 				uniforms.envMap.value = material.envMap;