Select the object’s shape node in the Attribute Editor and then go to Attribute -> RenderMan -> Add Sudvision Scheme. This will create a smooth surface.
Load your displacement texture in the Hypershade.
Play with the Alpha Gain and Alpha Offset to scale the image.
Alpha Offset should be half negative than Alpha Gain. So if Alpha Gain is 2 Alpha Offset should be -1
Drag the displacement texture on to the displacement material in the shading group attributes.
This will create a displacement node.
Select the displacement node and go to Attributes -> RenderMan -> Add Displacement Attribues.
Set the displacement bound to something similar to your highest displacement value.
If you are using ray trace rendering you need to add ray traced attributes to your displacement.
Select your shape node and go to Attribute -> RenderMan -> Manage attributes and select TraceDisplacement.
Turn the shading rate down to increase the quality of your displacement. You can add a RenderMan attribute to control this instead change the global render options, you’ll save a lot of render time.