diff --git a/README.md b/README.md
index 40ad131..e79f2e2 100644
--- a/README.md
+++ b/README.md
@@ -40,6 +40,7 @@ animation source code, the browser window will automatically reload and show the
 The example gifs are displayed at 25 fps. The source code for many of these examples are available
 on the live coding playground.
 
+![Tangent](gifs/tangent.gif)
 ![Goo](gifs/goo.gif)
 ![Drawing LaTeX equations](gifs/latex_draw.gif)
 ![Bounding boxes](gifs/bbox.gif)
diff --git a/gifs/tangent.gif b/gifs/tangent.gif
new file mode 100644
index 0000000..10330d0
Binary files /dev/null and b/gifs/tangent.gif differ
diff --git a/src/Reanimate/Render.hs b/src/Reanimate/Render.hs
index cd913f5..44b7ec5 100644
--- a/src/Reanimate/Render.hs
+++ b/src/Reanimate/Render.hs
@@ -52,7 +52,7 @@ renderFormat :: Format -> Animation -> FilePath -> IO ()
 renderFormat format ani target = do
   putStrLn $ "Starting render of animation: " ++ show (round (duration ani)) ++ "s"
   ffmpeg <- requireExecutable "ffmpeg"
-  generateFrames ani 640 fps $ \template ->
+  generateFrames ani 320 fps $ \template ->
     withTempFile "txt" $ \progress -> writeFile progress "" >>
     case format of
       RenderMp4 ->