diff --git a/src/add/three.js b/src/add/three.js
index e9c99413..02113411 100644
--- a/src/add/three.js
+++ b/src/add/three.js
@@ -111,6 +111,14 @@
         return this;
     };
 
+    BP.shallowClone = function() {
+        let geo = new THREE.BufferGeometry();
+        for (let [k, v] of Object.entries(this.attributes)) {
+            geo.setAttribute(k, new THREE.BufferAttribute(v.array, v.itemSize));
+        }
+        return geo;
+    };
+
     THREE.Object3D.prototype.newGroup = function() {
         var group = new THREE.Group();
         this.add(group);
diff --git a/src/mesh/group.js b/src/mesh/group.js
index 2469c249..83c04044 100644
--- a/src/mesh/group.js
+++ b/src/mesh/group.js
@@ -89,11 +89,6 @@ mesh.group = class MeshGroup extends mesh.object {
         return this;
     }
 
-    // update(oldmesh, newmesh) {
-    //     this.group.remove(oldmesh);
-    //     this.group.add(newmesh);
-    // }
-
     // center objects to group bounds
     // dependent on first being added to world/scene
     centerModels() {
diff --git a/src/mesh/model.js b/src/mesh/model.js
index ba98c0e6..127fe452 100644
--- a/src/mesh/model.js
+++ b/src/mesh/model.js
@@ -104,19 +104,15 @@ mesh.model = class MeshModel extends mesh.object {
         worker.model_load({id: this.id, name: this.file, vertices, indices});
     }
 
-    optimize(geo) {
-        let ind = THREE.BufferGeometryUtils.mergeVertices(geo || this.mesh.geometry);
-        console.log({geo: geo || this.mesh.geometry.clone(), ind});
-        return ind;
-    }
-
     reload(vertices, indices) {
         this.wireframe(false);
         let geo = this.mesh.geometry;
         geo.setAttribute('position', new THREE.BufferAttribute(vertices, 3));
         geo.setAttribute('normal', undefined);
         if (indices) geo.setIndex(new THREE.BufferAttribute(indices, 1));
+        geo.attributes.position.needsUpdate = true;
         geo.computeVertexNormals();
+        // sync data to worker
         worker.model_load({id: this.id, name: this.name, vertices, indices});
     }
 
@@ -141,7 +137,7 @@ mesh.model = class MeshModel extends mesh.object {
             mat.opacity = 1;
             mat.visible = false;
         } else {
-            mat.transparent = ov < 1.0;
+            mat.transparent = true;
             mat.opacity = ov;
             mat.visible = true;
         }
@@ -167,9 +163,8 @@ mesh.model = class MeshModel extends mesh.object {
             this.opacity(this._wireo);
         }
         if (bool) {
-            this.material({clone:true});
             this._wireo = this.opacity();
-            this._wire = new THREE.Mesh(this.mesh.geometry, materials.wireframe);
+            this._wire = new THREE.Mesh(this.mesh.geometry.shallowClone(), materials.wireframe);
             this.mesh.add(this._wire);
             this.opacity(opt.opacity || 0);
         }
@@ -177,10 +172,8 @@ mesh.model = class MeshModel extends mesh.object {
     }
 
     material(mat) {
-        this.mesh.material = mat.clone === true ? this.mesh.material.clone() : mat;
-        if (this._wire) {
-            this.wireframe(false);
-        }
+        this.wireframe(false);
+        this.mesh.material = mat;
     }
 
     remove() {