diff --git a/src/js/main.js b/src/js/main.js
index d21fd54..b9e383f 100644
--- a/src/js/main.js
+++ b/src/js/main.js
@@ -20,6 +20,25 @@ const PBR1_THREEJSMAPPING = {
         "metalness"		: "metalnessMap",
         "opacity"		: "alphaMap"
     },
+
+	// These are the "base" settings for ThreeJS if a specific map is active.
+	// This ensures, for example, that the metalness property is always actually active (set to 1) if a metalness map is used.
+	mapActiveSettings : {
+		"color" : ["color",new THREE.Color( 0xffffff )],
+		"normal": [null,null],
+		"roughness":["roughness",1],
+		"displacement":[null,null],
+		"metalness":["metalness",1],
+		"opacity":["opacity",1]
+	},
+	mapInactiveSettings: {
+		"color" : ["color",new THREE.Color( 0xdddddd )],
+		"normal": [null,null],
+		"roughness":["roughness",0.5],
+		"displacement":[null,null],
+		"metalness":["metalness",0],
+		"opacity":["opacity",1]
+	},
     encoding : {
         "sRGB": THREE.sRGBEncoding,
         "linear": THREE.LinearEncoding
diff --git a/src/js/pbr-material.js b/src/js/pbr-material.js
index 180be76..070dbfd 100644
--- a/src/js/pbr-material.js
+++ b/src/js/pbr-material.js
@@ -54,7 +54,23 @@ function updateScene(incomingSceneConfiguration,fallbackType){
 				texture.wrapT = THREE.RepeatWrapping;
 				texture.encoding = PBR1_THREEJSMAPPING.encoding[newSceneConfiguration[`${mapName}_encoding`]];
 				texture.repeat.set( 1, 1 );
+
+				// Apply additional settings to ensure that the maps actually have an effect
+
+				if(PBR1_THREEJSMAPPING.mapActiveSettings[mapName][0] != null){
+					PBR1_ELEMENTS.mesh.material[PBR1_THREEJSMAPPING.mapActiveSettings[mapName][0]] = PBR1_THREEJSMAPPING.mapActiveSettings[mapName][1];
+					console.log(PBR1_THREEJSMAPPING.mapActiveSettings[mapName][0]);
+				}
+
 			}else{
+
+				// Apply additional settings to ensure that the missing map is replaced with a sensible default
+
+				if(PBR1_THREEJSMAPPING.mapActiveSettings[mapName][0] != null){
+					PBR1_ELEMENTS.mesh.material[PBR1_THREEJSMAPPING.mapInactiveSettings[mapName][0]] = PBR1_THREEJSMAPPING.mapInactiveSettings[mapName][1];
+					console.log(PBR1_THREEJSMAPPING.mapActiveSettings[mapName][0]);
+				}
+
 				var texture = null;
 			}