diff --git a/package.json b/package.json
index e270182f..128217f0 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,7 @@
         "@gridspace/app-server": "github:gridspace/app-server#v0.0.19",
         "@gridspace/basic-ftp": "github:gridspace/basic-ftp#v5.0.5-gridspace",
         "@gridspace/net-level-client": "^0.2.3",
-        "@gridspace/raster-path": "^1.0.3",
+        "@gridspace/raster-path": "^1.0.4",
         "@tracespace/parser": "^5.0.0-next.0",
         "@tweenjs/tween.js": "^16.6.0",
         "base64-js": "^1.5.1",
diff --git a/src/kiri/mode/cam/topo4.js b/src/kiri/mode/cam/topo4.js
index 38300db5..e3a09916 100644
--- a/src/kiri/mode/cam/topo4.js
+++ b/src/kiri/mode/cam/topo4.js
@@ -179,6 +179,7 @@ export class Topo {
         for (let i=0; i<vertices.length; i+= 3) {
             let tmp = vertices[i+2];
             vertices[i+2] = vertices[i+0];
+            vertices[i+1] = -vertices[i+1];
             vertices[i+0] = tmp;
         }
         // console.timeEnd('swap XZ vertices');
@@ -186,7 +187,8 @@ export class Topo {
         let gpu = await self.get_raster_gpu({
             mode: "radial",
             resolution,
-            rotationStep: angle
+            rotationStep: angle,
+            radialRotationOffset: 90
         });
         let xStep = Math.max(1, Math.round(this.step / resolution));
         let boundsOverride = this.bounds.clone();
diff --git a/src/mesh/build.js b/src/mesh/build.js
index b2942c6c..5413222a 100644
--- a/src/mesh/build.js
+++ b/src/mesh/build.js
@@ -395,7 +395,7 @@ function ui_build() {
             div('File'),
             div({ class: "menu-items" }, [
                 input({
-                    id: "import", type: "file", class: ["hide"], multiple: true,
+                    id: "import", type: "file", class: ["hide"], multiple: true, accept:".stl,.obj",
                     onchange(evt) { broker.send.load_files(evt.target.files) }
                 }),
                 menu_item('Import', file.import, 'I'),