diff --git a/data/interiors_mbu/intermediate/sporkintheroad.dif b/data/interiors_mbu/intermediate/sporkintheroad.dif
index f0945155..9f6bce89 100644
Binary files a/data/interiors_mbu/intermediate/sporkintheroad.dif and b/data/interiors_mbu/intermediate/sporkintheroad.dif differ
diff --git a/src/DifBuilder.hx b/src/DifBuilder.hx
index 52a149f3..f1e29748 100644
--- a/src/DifBuilder.hx
+++ b/src/DifBuilder.hx
@@ -211,6 +211,12 @@ class DifBuilder {
 		}
 		];
 
+	static var customMaterialDict:Map<String, {
+		friction:Float,
+		restitution:Float,
+		?force:Float
+	}> = [];
+
 	static function createPhongMaterial(onFinish:hxsl.Shader->Void, baseTexture:String, normalTexture:String, shininess:Float, specularColor:Vector,
 			uvScaleFactor:Float = 1) {
 		var worker = new ResourceLoaderWorker(() -> {
@@ -381,6 +387,10 @@ class DifBuilder {
 			'pq_ray_wall_combo.normal.png', 'pq_ray_wall_combo.spec.png'),
 	];
 
+	public static function setCustomMaterialDefinitions(materials:Map<String, {friction:Float, restitution:Float, ?force:Float}>) {
+		customMaterialDict = materials;
+	}
+
 	public static function loadDif(path:String, itr:InteriorObject, onFinish:Void->Void, ?so:Int = -1) {
 		#if (js || android)
 		path = StringTools.replace(path, "data/", "");
@@ -493,12 +503,21 @@ class DifBuilder {
 					tri.uv3 = uv3;
 					triangles.push(tri);
 					var materialName = stripTexName(texture).toLowerCase();
-					var hasMaterialInfo = materialDict.exists(materialName);
-					if (hasMaterialInfo) {
-						var minfo = materialDict.get(materialName);
+
+					var hasCustomMaterialInfo = customMaterialDict.exists(materialName);
+					if (hasCustomMaterialInfo) {
+						var minfo = customMaterialDict.get(materialName);
 						colliderSurface.friction = minfo.friction;
 						colliderSurface.restitution = minfo.restitution;
 						colliderSurface.force = minfo.force != null ? minfo.force : 0;
+					} else {
+						var hasMaterialInfo = materialDict.exists(materialName);
+						if (hasMaterialInfo) {
+							var minfo = materialDict.get(materialName);
+							colliderSurface.friction = minfo.friction;
+							colliderSurface.restitution = minfo.restitution;
+							colliderSurface.force = minfo.force != null ? minfo.force : 0;
+						}
 					}
 					colliderSurface.addPoint(-p1.x, p1.y, p1.z);
 					colliderSurface.addPoint(-p2.x, p2.y, p2.z);
diff --git a/src/mis/MisParser.hx b/src/mis/MisParser.hx
index fd1c0b9a..99aeefb9 100644
--- a/src/mis/MisParser.hx
+++ b/src/mis/MisParser.hx
@@ -1,5 +1,6 @@
 package mis;
 
+import src.DifBuilder;
 import Macros.MisParserMacros;
 import haxe.Exception;
 import mis.MissionElement.MissionElementPathedInterior;
@@ -31,6 +32,8 @@ final lineCommentRegEx = ~/\/\/.*/g;
 final assignmentRegEx = ~/(\$(?:\w|\d)+)\s*=\s*(.+?);/g;
 final marbleAttributesRegEx = ~/setMarbleAttributes\("(\w+)",\s*(.+?)\);/g;
 final activatePackageRegEx = ~/activatePackage\((.+?)\);/g;
+final materialPropertyRegEx = ~/new MaterialProperty *\( *(.+?) *\)\s*{\s*((?:\w+ *= *(\d|\.)+;\s*)*)}/gi;
+final addMaterialMappingRegEx = ~/addMaterialMapping *\( *"(.+?)" *, *(.+?) *\)/gi;
 
 class MisParser {
 	var text:String;
@@ -71,6 +74,49 @@ class MisParser {
 		// var activatedPackages = [];
 		startText = outsideText;
 
+		var customMaterials = new Map<String, {
+			friction:Float,
+			restitution:Float,
+			?force:Float
+		}>();
+
+		while (materialPropertyRegEx.match(startText)) {
+			var materialName = materialPropertyRegEx.matched(1);
+			var subs = materialPropertyRegEx.matched(2);
+
+			var kvps = new Map<String, Float>();
+			var splits = subs.split(';').map(spl -> StringTools.trim(spl).toLowerCase());
+			for (prop in splits) {
+				var kv = prop.split('=').map(spl -> StringTools.trim(spl).toLowerCase());
+				kvps.set(kv[0], Std.parseFloat(kv[1]));
+			}
+
+			var material = {
+				friction: kvps.get("friction") ?? 1.0,
+				restitution: kvps.get("restitution") ?? 1.0,
+				force: kvps.get("force") ?? 0.0
+			};
+			customMaterials.set(materialName, material);
+
+			startText = materialPropertyRegEx.matchedRight();
+		}
+
+		startText = outsideText;
+
+		var materialMappings = new Map<String, {
+			friction:Float,
+			restitution:Float,
+			?force:Float
+		}>();
+		while (addMaterialMappingRegEx.match(startText)) {
+			var mmap = addMaterialMappingRegEx.matched(2);
+			if (customMaterials.exists(mmap))
+				materialMappings.set(addMaterialMappingRegEx.matched(1).toLowerCase(), customMaterials.get(mmap));
+			startText = addMaterialMappingRegEx.matchedRight();
+		}
+
+		DifBuilder.setCustomMaterialDefinitions(materialMappings);
+
 		// while (activatePackageRegEx.match(startText)) {
 		// 	activatedPackages.push(this.resolveExpression(activatePackageRegEx.matched(1)));
 		// 	startText = marbleAttributesRegEx.matchedRight();