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8.3 Iray attributes: Displacement attributes

 
Note:
 
The Displacement subsection is only available when a polygonal shape node is selected.
 
Attribute Editor: Iray Displacement sub-section
 
 
Limit
Defines the displacement height. Controls the maximum offset, in world units, that can be given to a vertex when displacing it. This value can affect the bounding box of an object.
 
Method
Parametric
Defines parametric subdivision as method to refine the displacement map. The objects topology is recursively subdivide to create the displacement effect. Each subdivision recursion potentially divides a single face into four smaller faces.
 
Length
Defines a topology independent method to subdivide a polygon for displacement mapping. Defines the smallest potential edge length due to subdivision. Iray stops subdividing an edge once it reaches this size.
 
Subdivision
This attribute is only valid when Parametric is selected as the displacement method. It defines the number of subdivisions for the given topology. Increasing this value generates a finer displacement but also increases rendering time.
 
Length Bound
This attribute is only valid when Length is selected as the displacement method. It defines the maximum length of a triangle in world space units. Decreasing this value generates a finer displacement but increases rendering time.