diff --git a/source/export/exporter.js b/source/export/exporter.js
index 4e30c11..3483608 100644
--- a/source/export/exporter.js
+++ b/source/export/exporter.js
@@ -17,7 +17,7 @@ OV.Exporter = class
         this.exporters.push (exporter);
     }
 
-    Export (exporterModel, format, extension, callbacks)
+    Export (model, settings, format, extension, callbacks)
     {
         let exporter = null;
         for (let i = 0; i < this.exporters.length; i++) {
@@ -32,6 +32,7 @@ OV.Exporter = class
             return;
         }
 
+        let exporterModel = new OV.ExporterModel (model, settings);
         exporter.Export (exporterModel, format, (files) => {
             if (files.length === 0) {
                 callbacks.onError ();
diff --git a/source/export/exportermodel.js b/source/export/exportermodel.js
index 127c237..94425fb 100644
--- a/source/export/exportermodel.js
+++ b/source/export/exportermodel.js
@@ -1,19 +1,25 @@
-OV.ExporterModel = class
+OV.ExporterSettings = class
 {
-    constructor (model, parameters)
+    constructor (settings)
     {
-        this.model = model;
-        this.parameters = {
-            isMeshVisible : (meshInstanceId) => {
-                return true;
-            }
+        this.isMeshVisible = (meshInstanceId) => {
+            return true;
         };
-        if (OV.IsDefined (parameters)) {
-            if (OV.IsDefined (parameters.isMeshVisible)) {
-                this.parameters.isMeshVisible = parameters.isMeshVisible;
+        if (OV.IsDefined (settings)) {
+            if (OV.IsDefined (settings.isMeshVisible)) {
+                this.isMeshVisible = settings.isMeshVisible;
             }
         }
     }
+};
+
+OV.ExporterModel = class
+{
+    constructor (model, settings)
+    {
+        this.model = model;
+        this.settings = settings;
+    }
 
     MaterialCount ()
     {
@@ -43,10 +49,19 @@ OV.ExporterModel = class
         return triangleCount;
     }
 
+    MeshInstanceCount ()
+    {
+        let meshInstanceCount = 0;
+        this.EnumerateMeshInstances ((meshInstance) => {
+            meshInstanceCount += 1;
+        });
+        return meshInstanceCount;
+    }
+
     EnumerateMeshInstances (onMeshInstance)
     {
         this.model.EnumerateMeshInstances ((meshInstance) => {
-            if (this.parameters.isMeshVisible (meshInstance.GetId ())) {
+            if (this.settings.isMeshVisible (meshInstance.GetId ())) {
                 onMeshInstance (meshInstance);
             }
         });
diff --git a/source/viewer/domutils.js b/source/viewer/domutils.js
index 6943c27..eaedf77 100644
--- a/source/viewer/domutils.js
+++ b/source/viewer/domutils.js
@@ -123,10 +123,27 @@ OV.AddRadioButton = function (parentElement, name, id, text, onChange)
     radio.setAttribute ('id', id);
     radio.setAttribute ('name', name);
     OV.AddDomElement (label, 'span', null, text);
-    radio.addEventListener ('change', onChange);
+    if (onChange) {
+        radio.addEventListener ('change', onChange);
+    }
     return radio;
 };
 
+OV.AddCheckbox = function (parentElement, id, text, isChecked, onChange)
+{
+    let label = OV.AddDomElement (parentElement, 'label');
+    label.setAttribute ('for', id);
+    let check = OV.AddDomElement (label, 'input', 'ov_checkbox');
+    check.setAttribute ('type', 'checkbox');
+    check.setAttribute ('checked', isChecked);
+    check.setAttribute ('id', id);
+    OV.AddDomElement (label, 'span', null, text);
+    if (onChange) {
+        check.addEventListener ('change', onChange);
+    }
+    return check;
+};
+
 OV.AddRangeSlider = function (parentElement, min, max)
 {
     let slider = OV.AddDomElement (parentElement, 'input', 'ov_slider');
diff --git a/test/tests/exporter_test.js b/test/tests/exporter_test.js
index 962cd01..7b8e2a8 100644
--- a/test/tests/exporter_test.js
+++ b/test/tests/exporter_test.js
@@ -65,8 +65,8 @@ function CreateTestModel ()
 function Export (model, format, extension, onReady)
 {
     let exporter = new OV.Exporter ();
-    let exporterModel = new OV.ExporterModel (model);
-    exporter.Export (exporterModel, format, extension, {
+    let settings = new OV.ExporterSettings ();
+    exporter.Export (model, settings, format, extension, {
         onSuccess : function (files) {
             onReady (files);
         }
@@ -76,7 +76,8 @@ function Export (model, format, extension, onReady)
 describe ('Exporter Model', function () {
     it ('No filter test', function (done) {
         let model = CreateTestModel ();
-        let exporterModel = new OV.ExporterModel (model);
+        let settings = new OV.ExporterSettings ();
+        let exporterModel = new OV.ExporterModel (model, settings);
         let meshInstances = [];
         exporterModel.EnumerateMeshInstances ((meshInstance) => {
             meshInstances.push (meshInstance);
@@ -89,11 +90,12 @@ describe ('Exporter Model', function () {
 
     it ('Model filter test', function (done) {
         let model = CreateTestModel ();
-        let exporterModel = new OV.ExporterModel (model, {
+        let settings = new OV.ExporterSettings ({
             isMeshVisible : (meshInstanceId) => {
                 return meshInstanceId.IsEqual (new OV.MeshInstanceId (0, 1));
             }
         });
+        let exporterModel = new OV.ExporterModel (model, settings);
         let meshInstances = [];
         exporterModel.EnumerateMeshInstances ((meshInstance) => {
             meshInstances.push (meshInstance);
@@ -109,8 +111,8 @@ describe ('Exporter', function () {
     it ('Exporter Error', function (done) {
         let model = CreateTestModel ();
         let exporter = new OV.Exporter ();
-        let exporterModel = new OV.ExporterModel (model);
-        exporter.Export (exporterModel, OV.FileFormat.Text, 'ext', {
+        let settings = new OV.ExporterSettings ();
+        exporter.Export (model, settings, OV.FileFormat.Text, 'ext', {
             onError : function () {
                 done ();
             }
diff --git a/test/tests/exportimport_test.js b/test/tests/exportimport_test.js
index 90ebb03..fa04a72 100644
--- a/test/tests/exportimport_test.js
+++ b/test/tests/exportimport_test.js
@@ -109,8 +109,8 @@ function CreateTestModel ()
 function ExportImport (model, format, extension, onReady)
 {
     let exporter = new OV.Exporter ();
-    let exporterModel = new OV.ExporterModel (model);
-    exporter.Export (exporterModel, format, extension, {
+    let settings = new OV.ExporterSettings ();
+    exporter.Export (model, settings, format, extension, {
         onSuccess : function (exportedFiles) {
             let importer = new OV.Importer ();
             let settings = new OV.ImportSettings ();
diff --git a/website/o3dv/css/controls.css b/website/o3dv/css/controls.css
index bb1b93b..bfb2618 100644
--- a/website/o3dv/css/controls.css
+++ b/website/o3dv/css/controls.css
@@ -132,6 +132,8 @@ select.ov_select
 {
 	color: var(--ov_dialog_foreground_color);
 	background: var(--ov_dialog_background_color);
+	font-family: Quicksand, Helvetica, sans-serif;
+	font-size: 16px;
 	padding: 3px;
 	border: 1px solid var(--ov_border_color);
 }
diff --git a/website/o3dv/css/dialogs.css b/website/o3dv/css/dialogs.css
index e38996e..7f77aed 100644
--- a/website/o3dv/css/dialogs.css
+++ b/website/o3dv/css/dialogs.css
@@ -160,13 +160,14 @@ div.ov_dialog div.ov_dialog_copyable_input div.ov_dialog_copyable_input_button
 
 div.ov_dialog div.ov_dialog_row
 {
-	padding: 2px 0px;
+	padding: 3px 0px;
 	overflow: auto;
 }
 
 div.ov_dialog div.ov_dialog_row_name
 {
 	width: 30%;
+	margin-top: 4px;
 	float: left;
 }
 
diff --git a/website/o3dv/js/exportdialog.js b/website/o3dv/js/exportdialog.js
index b81405d..ba4006f 100644
--- a/website/o3dv/js/exportdialog.js
+++ b/website/o3dv/js/exportdialog.js
@@ -34,6 +34,7 @@ OV.ModelExporterUI = class extends OV.ExporterUI
         super (name);
         this.format = format;
         this.extension = extension;
+        this.visibleOnlyCheckbox = null;
     }
 
     GetType ()
@@ -41,21 +42,43 @@ OV.ModelExporterUI = class extends OV.ExporterUI
         return OV.ExportType.Model;
     }
 
+    GenerateParametersUI (parametersDiv)
+    {
+        let line = OV.AddDiv (parametersDiv, 'ov_dialog_row');
+        this.visibleOnlyCheckbox = OV.AddCheckbox (line, 'export_visible_only', 'Export visible meshes only', true);
+    }
+
     ExportModel (model, callbacks)
     {
+        let visibleOnly = this.visibleOnlyCheckbox.checked;
+        let settings = new OV.ExporterSettings ({
+            isMeshVisible : (meshInstanceId) => {
+                if (visibleOnly) {
+                    return callbacks.isMeshVisible (meshInstanceId);
+                } else {
+                    return true;
+                }
+            }
+        });
+
+        // TODO
+        // if (exporterModel.MeshInstanceCount () === 0) {
+        //     let errorDialog = OV.ShowMessageDialog (
+        //         'Export Failed',
+        //         'The model doesn\'t contain any meshes.',
+        //         null
+        //     );
+        //     callbacks.onDialog (errorDialog);
+        //     return;
+        // }
+
         let progressDialog = new OV.ProgressDialog ();
         progressDialog.Init ('Exporting Model');
         progressDialog.Show ();
 
         OV.RunTaskAsync (() => {
             let exporter = new OV.Exporter ();
-            let exporterModel = new OV.ExporterModel (model, {
-                isMeshVisible : (meshInstanceId) => {
-                    // TODO return callbacks.isMeshVisible (meshInstanceId);
-                    return true;
-                }
-            });
-            exporter.Export (exporterModel, this.format, this.extension, {
+            exporter.Export (model, settings, this.format, this.extension, {
                 onError : () => {
                     progressDialog.Hide ();
                 },
diff --git a/website/o3dv/js/sharingdialog.js b/website/o3dv/js/sharingdialog.js
index e4c537b..50a5a08 100644
--- a/website/o3dv/js/sharingdialog.js
+++ b/website/o3dv/js/sharingdialog.js
@@ -3,15 +3,8 @@ OV.ShowSharingDialog = function (importer, settings, camera)
     function AddCheckboxLine (parentDiv, text, id, onChange)
     {
         let line = OV.AddDiv (parentDiv, 'ov_dialog_row');
-        let label = OV.AddDomElement (line, 'label');
-        label.setAttribute ('for', id);
-        let check = OV.AddDomElement (label, 'input', 'ov_checkbox');
-        check.setAttribute ('type', 'checkbox');
-        check.setAttribute ('checked', 'true');
-        check.setAttribute ('id', id);
-        OV.AddDomElement (label, 'span', null, text);
-        check.addEventListener ('change', () => {
-            onChange (check.checked);
+        let checkbox = OV.AddCheckbox (line, id, text, true, () => {
+            onChange (checkbox.checked);
         });
     }