title: buffer textures in Opengl ES 3.0
body: <p>I am writing in GL ES 3.0 and i need to write a vertex shader that can access the attributes of other vertices (identified by their index). The attributes of the vertices may change from frame to frame.
  Buffer textures would have been ideal but as far as i can tell they are not implemented in GL ES 3.0.
  Is there another way to do this? other than render all my attributes to textures every frame which would be a huge performance penalty.  </p>