diff --git a/.github/workflows/render.yml b/.github/workflows/render.yml
new file mode 100644
index 0000000..92115be
--- /dev/null
+++ b/.github/workflows/render.yml
@@ -0,0 +1,156 @@
+name: render
+on: push
+jobs:
+  render:
+    runs-on: ubuntu-22.04
+    steps:
+
+      - name: download ninja binary
+        run: curl -LO https://github.com/ninja-build/ninja/releases/download/v1.10.2/ninja-linux.zip
+
+      - name: extract ninja binary
+        run: unzip ninja-linux.zip
+
+      - name: install ninja
+        run: sudo install ninja /usr/local/bin/
+
+      - name: update system
+        run: sudo apt-get update
+
+      - name: install openscad
+        run: sudo apt-get install -y --no-install-recommends openscad xvfb
+
+      - uses: actions/checkout@v4
+        with:
+          submodules: true
+
+      - name: render 3mf
+        run: ninja a5-stop.3mf
+
+      - name: add commit hash to 3mf filename
+        run: mv a5-stop.3mf a5-stop_${{ github.sha }}.3mf
+
+      - name: upload 3mf
+        uses: actions/upload-artifact@v2
+        with:
+          name: a5-stop_${{ github.sha }}.3mf
+          path: a5-stop_${{ github.sha }}.3mf
+
+      - name: render stl
+        run: ninja a5-stop.stl
+
+      - name: add commit hash to stl filename
+        run: mv a5-stop.stl a5-stop_${{ github.sha }}.stl
+
+      - name: upload stl
+        uses: actions/upload-artifact@v2
+        with:
+          name: a5-stop_${{ github.sha }}.stl
+          path: a5-stop_${{ github.sha }}.stl
+
+      - name: render png
+        uses: coactions/setup-xvfb@v1
+        with:
+          run: ninja a5-stop.png
+
+      - name: add commit hash to png filename
+        run: mv a5-stop.png a5-stop_${{ github.sha }}.png
+
+      - name: upload png
+        uses: actions/upload-artifact@v2
+        with:
+          name: a5-stop_${{ github.sha }}.png
+          path: a5-stop_${{ github.sha }}.png
+
+  github-release:
+    needs: render
+    runs-on: ubuntu-22.04
+    if: startsWith(github.ref, 'refs/tags/v')
+    permissions:
+      contents: write
+    steps:
+
+      - name: calculate new version
+        uses: frabert/replace-string-action@v1.1
+        with:
+          string: ${{ github.ref }}
+          pattern: 'refs/tags/v'
+          replace-with: ''
+        id: version
+
+      - name: download 3mf
+        uses: actions/download-artifact@v2
+        with:
+          name: a5-stop_${{ github.sha }}.3mf
+
+      - name: download stl
+        uses: actions/download-artifact@v2
+        with:
+          name: a5-stop_${{ github.sha }}.stl
+
+      - name: create github release
+        uses: actions/create-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          body: |
+            ![2d render](https://qguv.github.io/a5-stop/img/a5-stop_${{ steps.version.outputs.replaced }}.png)
+          tag_name: ${{ github.ref }}
+          release_name: Release ${{ steps.version.outputs.replaced }}
+          draft: true
+          prerelease: ${{ startsWith(github.ref, 'refs/tags/v0.') }}
+        id: create_release
+
+      - name: upload 3mf as a release asset
+        uses: actions/upload-release-asset@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ steps.create_release.outputs.upload_url }}
+          asset_path: a5-stop_${{ github.sha }}.3mf
+          asset_name: a5-stop_${{ steps.version.outputs.replaced }}.3mf
+          asset_content_type: application/octet-stream
+
+      - name: upload stl as a release asset
+        uses: actions/upload-release-asset@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ steps.create_release.outputs.upload_url }}
+          asset_path: a5-stop_${{ github.sha }}.stl
+          asset_name: a5-stop_${{ steps.version.outputs.replaced }}.stl
+          asset_content_type: application/octet-stream
+
+  gh-pages-release:
+    needs: render
+    runs-on: ubuntu-22.04
+    if: startsWith(github.ref, 'refs/tags/v')
+    permissions:
+      contents: write
+    steps:
+
+      - name: calculate new version
+        uses: frabert/replace-string-action@v1.1
+        with:
+          string: ${{ github.ref }}
+          pattern: 'refs/tags/v'
+          replace-with: ''
+        id: version
+
+      - uses: actions/download-artifact@v2
+        with:
+          name: a5-stop_${{ github.sha }}.png
+
+      - name: upload rendered image
+        run: |
+          mkdir -p gh-pages/img
+          cp a5-stop_${{ github.sha }}.png gh-pages/img/a5-stop.png
+          cp a5-stop_${{ github.sha }}.png gh-pages/img/a5-stop_${{ steps.version.outputs.replaced }}.png
+
+      - name: deploy to github pages
+        uses: peaceiris/actions-gh-pages@v3
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: gh-pages/
+          keep_files: true
+          enable_jekyll: false
diff --git a/.gitignore b/.gitignore
index c511f92..aba5293 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,4 @@
 .ninja_log
-pillstack.3mf
+*.3mf
+*.stl
+*.png
diff --git a/BOSL2 b/BOSL2
deleted file mode 160000
index 46f7835..0000000
--- a/BOSL2
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 46f7835dbf0935373192ef0d8c7d5176eb87f304
diff --git a/README.md b/README.md
index a78bcb6..4a4530b 100644
--- a/README.md
+++ b/README.md
@@ -1,13 +1,9 @@
 # a5 alignment stop
 
-A5 alignment stop for the Dahle 507 paper cutter
+![3d render of object](https://qguv.github.io/a5-stop/img/a5-stop.png)
 
-## building
-
-once you have the submodules (`git submodule update --init`), run `ninja` or `openscad -o a5.3mf a5.scad`
+Customizable, 3d-printable A5 alignment stop for the Dahle 507 paper cutter.
 
-## animation
-
-some animations are included at the beginning of pillstack.scad. you can uncomment them (one at a time) to view them. from the OpenSCAD GUI, select View → Animate, then set FPS to 30 and Steps to 360
+## building
 
-note: this seems to prevent OpenSCAD from automatically updating the preview when the source changes
+Once you have the submodules (`git submodule update --init`), run `ninja` or `openscad -o pillstack.3mf pillstack.scad`
diff --git a/a5-stop.scad b/a5-stop.scad
index 0386a72..336d0a2 100644
--- a/a5-stop.scad
+++ b/a5-stop.scad
@@ -1,10 +1,3 @@
-// animation: fix camera in place
-//$vpr = [$vpr[0], 0, $vpr[2]];
-//$vpt = [0, 0, 0];
-
-// animation: spin
-//$vpr = [$vpr[0], 0, 360 * $t];
-
 include <BOSL2/std.scad>
 
 $fn = 90;
@@ -60,4 +53,4 @@ module all() {
     }
 }
 
-all();
\ No newline at end of file
+all();
diff --git a/build.ninja b/build.ninja
index 10b8eeb..9dff73b 100644
--- a/build.ninja
+++ b/build.ninja
@@ -1,4 +1,9 @@
-rule openscad
+rule render3d
     command = openscad -o $out $in
 
-build a5-stop.3mf: openscad a5-stop.scad
+rule render2d
+    command = openscad --colorscheme BeforeDawn -o $out $in
+
+build a5-stop.3mf: render3d a5-stop.scad
+build a5-stop.stl: render3d a5-stop.scad
+build a5-stop.png: render2d a5-stop.scad