title: GLSL shader for texture 'smoke' effect
body: <p>I've looked around and haven't found anything relevant. I'm tyring to create a shader to give a texture smoke effect animation like here:</p>
  
  <p><img src="https://media.giphy.com/media/TlK63Evv795rJPJI4h2/giphy.gif" alt="example"></p>
  
  <p>Not asking for a complete/full solution (although that would be awesome) but any pointers towards where I can get started to achieve this effect. Would i need to have the vertices for the drawing or is this possible if I have the texture only?</p>