How does displacement in material work?

[Crayox13]

It's much easier for me to use material displacement in this scene (for the stone wall) but I get different results on different objects. All have the same material but it looks like amount is different on the outer wall, house wall, pool wall...



Is the difference due to the different size of objects?
Material displacement settings are set in vray default displacement under settings?

[glorybound]

It's probably just the viewing angle. I don't really notice anything off. The only issue I have had with displacement, other than rendering times hikes, is reversed normals.

[Crayox13]

Yes, had the inverse normals too
Will try without "relative to bbox" too