Geometry lines on render

[array81]

I'm trying to use VRAY to make a render with SketchUp. This is my first time with VRAY.
The result is good but I get some problem with terrain model.
As you can see there are some lines on terrain:

Model


Render


How can I remove it?

[add101]

Are you using V-Ray Displacement? Turn on the V-Ray displacement parameter called 'keep continuity' to get the render to continue the displaced surface between non-coplanar surfaces.

[array81]

Are you using V-Ray Displacement? Turn on the V-Ray displacement parameter called 'keep continuity' to get the render to continue the displaced surface between non-coplanar surfaces.

Yes I use displacement but the "keep continuity" is active:

V-Ray material:


Render:


Any ideas?

[jiminy-billy-bob]

Try to soften/smooth the edges of the terrain.

[array81]

Try to soften/smooth the edges of the terrain.

How?
I just try to click with right button of mouse on terrain, select option to soften/smooth, change value.
In this way on SketchUp I don't see geomtry lines any more but on render I see my of these (not all).