diff --git a/src/kiri-mode/cam/client.js b/src/kiri-mode/cam/client.js
index a46d0158..b9d9a408 100644
--- a/src/kiri-mode/cam/client.js
+++ b/src/kiri-mode/cam/client.js
@@ -11,6 +11,8 @@ const { base, kiri } = root;
 const { newPoint, newPolygon } = base;
 const { driver } = kiri;
 const { CAM } = driver;
+const DEG2RAD = Math.PI / 180;
+const RAD2DEG = 180 / Math.PI;
 
 let isAnimate,
     isArrange,
@@ -609,7 +611,7 @@ CAM.init = function(kiri, api) {
         for (let widget of API.widgets.all()) {
             widget.setAxisIndex(isPreview || !isIndexed ? 0 : -index);
         }
-        currentIndex = isIndexed && !isPreview ? index * (Math.PI / 180) : 0;
+        currentIndex = isIndexed && !isPreview ? index * DEG2RAD : 0;
         updateStock();
     });
 
@@ -809,7 +811,7 @@ CAM.init = function(kiri, api) {
         func.clearPops();
         alert = api.show.alert("analyzing surfaces...", 1000);
         let surfaces = poppedRec.surfaces;
-        CAM.surface_prep(() => {
+        CAM.surface_prep(currentIndex * RAD2DEG, () => {
             api.hide.alert(alert);
             alert = api.show.alert("[esc] cancels surface editing");
             for (let [wid, arr] of Object.entries(surfaces)) {
@@ -1393,7 +1395,7 @@ CAM.init = function(kiri, api) {
     }
 
     api.event.on('tool.mesh.face-normal', normal => {
-        poppedRec.degrees = (Math.atan2(normal.y, normal.z) * (180 / Math.PI)).round(2);
+        poppedRec.degrees = (Math.atan2(normal.y, normal.z) * RAD2DEG).round(2);
         poppedRec.absolute = true;
         func.opRender();
         updateStock();
diff --git a/src/kiri-mode/cam/driver.js b/src/kiri-mode/cam/driver.js
index 057f3123..140de1bd 100644
--- a/src/kiri-mode/cam/driver.js
+++ b/src/kiri-mode/cam/driver.js
@@ -25,10 +25,10 @@ CAM.process = {
 kiri.load(api => {
 
     if (kiri.client) {
-        CAM.surface_prep = function(ondone) {
+        CAM.surface_prep = function(index, ondone) {
             kiri.client.sync();
             const settings = api.conf.get();
-            kiri.client.send("cam_surfaces", { settings }, output => {
+            kiri.client.send("cam_surfaces", { settings, index }, output => {
                 ondone(output);
             });
         };
@@ -78,10 +78,11 @@ kiri.load(api => {
     }
 
     if (kiri.worker) {
-        CAM.surface_prep = function(widget) {
+        CAM.surface_prep = function(widget, index) {
             if (!widget.tool) {
                 let tool = widget.tool = new mesh.tool();
-                tool.index(widget.getVertices().array);
+                let translate = index ? true : false;
+                tool.index(widget.getGeoVertices(true, translate));
             }
         };
 
@@ -91,10 +92,17 @@ kiri.load(api => {
         };
 
         kiri.worker.cam_surfaces = function(data, send) {
-            const { settings } = data;
+            const { settings, index } = data;
             const widgets = Object.values(kiri.worker.cache);
             for (let widget of widgets) {
-                CAM.surface_prep(widget);
+                if (index) {
+                    widget.setIndexed(1);
+                    widget.setAxisIndex(-index);
+                } else {
+                    widget.setIndexed(0);
+                    widget.setAxisIndex(0);
+                }
+                CAM.surface_prep(widget, index);
             }
             send.done({});
         };
diff --git a/src/kiri-mode/cam/ops.js b/src/kiri-mode/cam/ops.js
index e837a727..82d5362b 100644
--- a/src/kiri-mode/cam/ops.js
+++ b/src/kiri-mode/cam/ops.js
@@ -266,22 +266,22 @@ class OpRough extends CamOp {
         }
 
         // inset or eliminate thru holes from shadow
-        // shadow = POLY.flatten(shadow.clone(true), [], true);
-        // thruHoles.forEach(hole => {
-        //     shadow = shadow.map(p => {
-        //         if (p.isEquivalent(hole)) {
-        //             // eliminate thru holes when roughing voids enabled
-        //             if (op.voids) {
-        //                 return undefined;
-        //             }
-        //             let po = POLY.offset([p], -(toolDiam / 2 + roughLeave + 0.01));
-        //             return po ? po[0] : undefined;
-        //         } else {
-        //             return p;
-        //         }
-        //     }).filter(p => p);
-        // });
-        // shadow = POLY.nest(shadow);
+        shadow = POLY.flatten(shadow.clone(true), [], true);
+        thruHoles.forEach(hole => {
+            shadow = shadow.map(p => {
+                if (p.isEquivalent(hole)) {
+                    // eliminate thru holes when roughing voids enabled
+                    // if (op.voids) {
+                    //     return undefined;
+                    // }
+                    let po = POLY.offset([p], -(toolDiam / 2 + roughLeave + 0.01));
+                    return po ? po[0] : undefined;
+                } else {
+                    return p;
+                }
+            }).filter(p => p);
+        });
+        shadow = POLY.nest(shadow);
         if (op.voids) {
             for (let s of shadow) s.inner = undefined;
         }
@@ -1118,8 +1118,8 @@ class OpPocket extends CamOp {
             }
         }
         let surfaces = op.surfaces[widget.id] || [];
-        // let vert = widget.getGeoVertices(true,true).map(v => v.round(4));
-        let vert = widget.getVertices().array.map(v => v.round(4));
+        let vert = widget.getGeoVertices(true,true).map(v => v.round(4));
+        // let vert = widget.getVertices().array.map(v => v.round(4));
         let outline = [];
         let faces = CAM.surface_find(widget, surfaces);
         let zmin = Infinity;
diff --git a/src/mesh/tool.js b/src/mesh/tool.js
index b478d3dc..e0c354db 100644
--- a/src/mesh/tool.js
+++ b/src/mesh/tool.js
@@ -238,7 +238,7 @@ mesh.tool = class MeshTool {
         while (check.length) {
             const face = check.shift();
             const froot = face * 6;
-            if (filterZ !== undefined && norms[froot +2] < filterZ) {
+            if (filterZ !== undefined && norms[froot + 2] < filterZ) {
                 continue;
             }
             const fadj = this.getAdjacentFaces(face);