user3572: I have 200 layers in Illustrator CS6. I have another set of the same layers but where basic attributes (position, scale) have changed.
Is there a way to import these two "states" into After Effects CS6 so that I end up with 200 layers animating from state 1 to state 2?

user2178: I have tried the following steps with 4 layers, and it seemed to work.

Name the file with the state 1 set, your-filename-1.ai and the file with the state 2 set your-filename-2.ai. Make sure they are in the same folder
Open After Effects, click File -> Import -> File... and click your-filename-1.ai. Make sure the checkmark is checked as shown below:

 
To keep all the individual layers, set Import As: to Composition.
 3. Now you will have a composition in your project panel named your-filename and a folder named your-filename Layers that contains all the layers.
 5. Now you can open the composition and check Frame Blending -> Frame Mix for every layer that you want to tween.
 6. Don't forget to enable frame blending. The image below shows how to do this:
 
Now you have an animation from state 1 to state 2. To change the animation playback speed you can use time-stretching on a layer-per-layer basis.

3572: <p>I have 200 layers in Illustrator CS6. I have another set of the same layers but where basic attributes (position, scale) have changed.</p>

<p>Is there a way to import these two "states" into After Effects CS6 so that I end up with 200 layers animating from state 1 to state 2?</p>
 2178: <p>I have tried the following steps with 4 layers, and it seemed to work.</p>

<ol>
<li>Name the file with the state 1 set, <code>your-filename-1.ai</code> and the file with the state 2 set <code>your-filename-2.ai</code>. Make sure they are in the same folder</li>
<li>Open After Effects, click <code>File -&gt; Import -&gt; File...</code> and click <code>your-filename-1.ai</code>. Make sure the checkmark is checked as shown below:</li>
</ol>

<p><img src="https://i.stack.imgur.com/OLH0O.png" alt="enter image description here">  </p>

<p>To keep all the individual layers, set <code>Import As:</code> to <code>Composition</code>.<br>
 3. Now you will have a composition in your project panel named <code>your-filename</code> and a folder named <code>your-filename Layers</code> that contains all the layers.
 5. Now you can open the composition and check <code>Frame Blending -&gt; Frame Mix</code> for every layer that you want to tween.
 6. Don't forget to enable frame blending. The image below shows how to do this:
 <img src="https://i.stack.imgur.com/jyrFe.png" alt="enter image description here"></p>

<p>Now you have an animation from state 1 to state 2. To change the animation playback speed you can use time-stretching on a layer-per-layer basis.</p>
