Feature-based displacement map attributes
 
 
 

You can find these attributes under the Displacement Map section of the shape node’s Attribute Editor.

Feature Displacement

Turn on (default) Feature-based Displacement.

NoteWe do not recommend that you turn off Feature-based displacement to use non-feature-based displacement.
Initial Sample Rate

This rate is used to check the texture values to determine the difference between displacement heights and where to introduce new vertices. It defines a regular sampling grid in each original tessellation triangle. For example, with the default value of 6, the sample grid is 6x6.

Try to keep this sample rate to a reasonable value since it does take longer to render the higher the value.

For each tessellation triangle, notice how much texture height variation is in the triangle and estimate how many initial samples are required to include these features when displacement mapping. Consider the following: