From the Fences Pro information page. LINK
Coming soon: Customization!
While not yet an available feature, future versions of Fences Pro will offer the capability to customize fences' looks by more than just changing their color. In addition to being able to customize each fence individually, Fences Pro will also add the ability for you to set your own image, texture, or custom "skin" as the background for your Fence. Design your own, or use a template created by one of our artists.
So the answer to your question is not now but......... "coming soon"