diff --git a/examples/js/loaders/3MFLoader.js b/examples/js/loaders/3MFLoader.js
index 3891a62b831ef802b9e85d7bc7d6dcb1c685d57e..a11de2c4beb1fe7dab6f33be9b865475699e765c 100644
--- a/examples/js/loaders/3MFLoader.js
+++ b/examples/js/loaders/3MFLoader.js
@@ -970,7 +970,7 @@ THREE.ThreeMFLoader.prototype = Object.assign( Object.create( THREE.Loader.proto
 
 			// material
 
-			var material = new THREE.MeshPhongMaterial( { vertexColors: THREE.VertexColors } );
+			var material = new THREE.MeshPhongMaterial( { vertexColors: THREE.VertexColors, flatShading: true } );
 
 			// mesh
 
diff --git a/examples/jsm/loaders/3MFLoader.js b/examples/jsm/loaders/3MFLoader.js
index 14d66724b9ce54a5550464e72fd70d8569b67afc..a9ad270d5ed02625fa5738ff557b23c10e1295e9 100644
--- a/examples/jsm/loaders/3MFLoader.js
+++ b/examples/jsm/loaders/3MFLoader.js
@@ -993,7 +993,7 @@ ThreeMFLoader.prototype = Object.assign( Object.create( Loader.prototype ), {
 
 			// material
 
-			var material = new MeshPhongMaterial( { vertexColors: VertexColors } );
+			var material = new MeshPhongMaterial( { vertexColors: VertexColors, flatShading: true } );
 
 			// mesh