title: Opengl Alpha Blending not working?
body: <p>In my Opengl Application (lwjgl) I enabled alpha blending like this:</p>
  
  <pre><code>GL11.glEnable(GL11.GL_BLEND);
  GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
  </code></pre>
  
  <p>The result, when drawing two gradient circles, looks like this:</p>
  
  <p><img src="https://i.stack.imgur.com/WOcGH.png" alt="enter image description here"></p>
  
  <p>How can this be? (The black overlap is transparency actually...)</p>