Panning Displacement


I’m actually working on a big landscape.

I want to use a tilling texture to move the landscape (panning) with a shader. I can’t move meshes.
But i met few problems :
Here a little video.

There are 2 main issues :

  • The panner is not Linear (look at the big black line), it is moving step by step. it’s creating very strange movements on my textures. I just need a linear panner and i don’t understand why it is doing this.
  • Panning my displacement map is creating very little waves on the mesh (you can see it on the foreground). It’s not linear. Vextex are making little jumps.

How i can fix this plz?

Thank you in advance

PG - Environment artist - Cyanide Studio

Here it’s my displacement shader and map :