diff --git a/app.js b/app.js
index 9fb6ef11..461487ac 100644
--- a/app.js
+++ b/app.js
@@ -299,6 +299,7 @@ const script = {
         "kiri",
         "ext/three",
         "ext/pngjs",
+        "ext/jszip",
         "license",
         "ext/clip2",
         "ext/earcut",
diff --git a/package.json b/package.json
index 2bb4cca2..6153cbe0 100644
--- a/package.json
+++ b/package.json
@@ -26,6 +26,7 @@
         "connect": "^3.7.0",
         "earcut": "^2.2.2",
         "express-useragent": "^1.0.13",
+        "jszip": "^3.5.0",
         "level": "^6.0.1",
         "leveldown": "^5.6.0",
         "levelup": "^4.4.0",
diff --git a/src/ext/jszip.js b/src/ext/jszip.js
new file mode 120000
index 00000000..aa70f346
--- /dev/null
+++ b/src/ext/jszip.js
@@ -0,0 +1 @@
+../../node_modules/jszip/dist/jszip.js
\ No newline at end of file
diff --git a/src/kiri/client.js b/src/kiri/client.js
index a7427c1d..9a60e029 100644
--- a/src/kiri/client.js
+++ b/src/kiri/client.js
@@ -15,7 +15,9 @@ let KIRI = self.kiri = self.kiri || {},
     syncd = {},
     running = {},
     slicing = {},
-    worker = null;
+    worker = null
+    // occ = new Worker("/kiri/ext/occ-worker.js", {type:"module"}),
+    ;
 
 /**
  * @param {Function} fn name of function in KIRI.worker
@@ -243,6 +245,12 @@ KIRI.work = {
                 output(reply.done);
             }
         }, [ data.png ]);
+    },
+
+    zip: function(files) {
+        send("zip", {files}, reply => {
+            console.log({zip_said: reply});
+        });
     }
 };
 
diff --git a/src/kiri/worker.js b/src/kiri/worker.js
index 89a8ce49..da70b9e4 100644
--- a/src/kiri/worker.js
+++ b/src/kiri/worker.js
@@ -536,6 +536,24 @@ KIRI.worker = {
             // send.done({done: {verts, faces, bigv, vi, ii}}, [ bigv.buffer ]);
             send.done({done: {bigv}}, [ bigv.buffer ]);
         });
+    },
+
+    zip: function(data, send) {
+        let { files } = data;
+        let zip = new JSZip();
+        for (let file of files) {
+            zip.file(file.name, file.data);
+        }
+        zip.generateAsync({
+            type: "uint8array",
+            compression: "DEFLATE",
+            compressionOptions: { level: 3 },
+            streamFiles: true
+        }, progress => {
+            send.data(progress);
+        }).then(output => {
+            send.done(output);
+        });
     }
 };
 
diff --git a/src/mode/cam/ops.js b/src/mode/cam/ops.js
index 331d1e0f..69434c45 100644
--- a/src/mode/cam/ops.js
+++ b/src/mode/cam/ops.js
@@ -405,7 +405,7 @@
             indices = indices.appendAll(flats).sort((a,b) => b-a);
             // console.log('indices', ...indices, {zBottom, slicer});
             if (op.outside && !op.inside) {
-                console.log({outline_bypass: indices, down: op.down});
+                // console.log({outline_bypass: indices, down: op.down});
                 indices.forEach((ind,i) => {
                     if (flats.indexOf(ind) >= 0) {
                         // exclude flats