title: When using an image as a button how can I ignore the transparent parts when detecting a click
body: <p>I'm creating a 2d game with my brother in Unity and I am working on the interactive map (Using pixel art). I want to place different territory images together like puzzle pieces, but when it detects a click on a territory I don't want the transparent parts of the image to be detected.</p>
  
  <p>I am a beginner and need some help with this. Any help is appreciated.</p>
  
  <p>Example of the map and overlap.
  <a href="https://i.stack.imgur.com/rQMf2.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/rQMf2.png" alt="Example of the map and overlap."></a></p>