I'm no node wizard, so I'd recommend the Displacement node.  
Then you can use UV maps for better control.

 1. Add a Subdivision modifier set to Simple (4+ levels)
 2. Use your hexagon texture to drive the Displacement node
 3. Enable true Displacement in material properties

[![enter image description here][1]][1]
[![enter image description here][2]][2]


  [1]: https://i.sstatic.net/CfZt0.jpg
  [2]: https://i.sstatic.net/KJ2lq.png