Hello guys.
I have a problem.
Can anyone tell me how to solve the bad shaded faces in displacement shading?
I cracking up Shading Quality in Dicing tab but it doesn't solve it completely.
Thanks in advance.

Do you have proper normals?
Have you tried other settings on the render tab for “Ray Predicing”?

I'm getting normal from displacement along normal itself.
Yes, I used other settings on Ray Predicing but problem still persist.
Seems increasing shading quality is the only way!

This is the central problem of displacement. The surface features of the displacement do not correspond with the mesh topology, which is usually diced in to grids before displacement.

To get the displacement features to be sharp, even though they cross diagonally through the actual mesh topology requires an extremely high amount of subdivision to achieve a clean result, and may never actually be perfect within the confines of your memory limits.

One thing you can try besides increasing shading quality, is to enable “re-dice displacements” which should attempt to refine the mesh a second time after moving the initial diced vertices into position.

JMack

Thank you so much jsmack.