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@@ -1,5 +1,7 @@
 # An Introduction to Unity ML-Agents [[introduction-to-ml-agents]]
 
+<img src="https://huggingface.co/datasets/huggingface-deep-rl-course/course-images/resolve/main/en/unit7/thumbnail.png" alt="thumbnail"/>
+
 One of the challenges in Reinforcement Learning is to **create environments**. Fortunately for us, we can use game engines.
 Game engines like [Unity](https://unity.com/), [Godot](https://godotengine.org/) or [Unreal Engine](https://www.unrealengine.com/), are programs made to create video games. They are perfectly suited
 for creating environments: they provide physics systems, 2D/3D rendering, and more.