How to make the result a better resolution?

hello everyone, how to set up the paraview to use the node-value instead of the cell-value when post-processing?(can you give me a specific instruction?)
(the case used DEM methord)
ps: Is there any other methords to make the result a better resolution?

There is a Paraview help forum here:

Select BACKGROUND_CELLDATA.pvd in the pipeline browser and apply the “Cell to point data” filter to it. This doesn’t change the resolution though, it is just interpolating the cell data from center to corner points.

The mesh appears fairly coarse, it you want better resolution, you can refine the mesh.