Converts a displacement map on a NURBS surface into mesh geometry.
A displacement map, when placed on a surface and rendered, gives the object the appearance of highly-modeled geometry, as the surface modulates based on the gray values of the displacement map.
By converting the displacement map to mesh geometry, you create real geometry that can be modified, rendered, or used in prototyping.
Displacement Map To Mesh Options
If
this option is checked, the tessellation values set in Render > Globals 
are used. If it is not checked
(default), you can enter your own values for the Mesh
Tolerance and Displacement Detail.
The maximum allowable distance (measured in centimeters) between a NURBS surface and its tessellated version, before the displacement map is applied. The Mesh Tolerance value controls how smoothly surfaces are tessellated for rendering.
A smoother tessellated surface results in a smoother final mesh. However, rendering time could increase.
The slider range is 0.001 cm to 0.10 cm. The default value is 0.05 cm for medium quality.
Controls how finely surface areas with displacement maps are tessellated. The higher the Displacement Detail value, the finer the appearance of surface displacements. However, rendering times could also increase. The slider range is 10 - 512. The default value is 40.
