We've just added a new dimension to the Post Insights report. You now have access to Full Picture URL.
In order to take advantage of this new dimension, all you need to do is ensure that your Facebook Page was connected with the Post Insights report:
If you've already connected this report to Funnel, no action is required to obtain data for this dimension going forward.
You can learn more about the data you can obtain from Facebook Pages in this article.
We hope that you find this new field useful! If you have any questions or if you would like historic data for this dimension please contact firstname.lastname@example.org and we'll be happy to help.