Polygon cutting and missing :(

[Artice-3d]

Hello guys !!!  I'm using painted shader+displacement and when render terrain some polygons are cutting and missing  like clipping.. How to fix that ?!!! Thanks for any help 

[Dune]

This is beacuse of extreme displacements. In the planet node increase displacement tolerance, but a little at the time (10%), as it increases rendertime.

[Artice-3d]

Oh my  thankssss a lot, i tried many stuff, but didn't see this option..  Thanks!!   One more question - At this forum is a topic about vertical clipping of terrain generated by function, not as highfield ??  Highfield has this function, but no clipping for function generated terrain