Advanced Surface Approximation Dialog (NURBS)

Command entry:

Modify panel

Select a NURBS surface object or surface sub-object.

Surface Approximation rollout

Tessellation Method group box

Turn off Lock To Top Level.

Advanced Parameters button

Command entry:Select an editable mesh object.

Modify panel

Surface Properties rollout

Advanced Parameters button

This dialog sets parameters that control the tessellation used in the Spatial, Curvature, and Spatial and Curvature approximation methods.

Interface

Subdivision Style

Chooses the method used to subdivide the surface:

Grid: Subdivides the surface using a regular grid.
Tree: (The default.) Subdivides the surface using a binary tree.
Delaunay: Subdivides the surface using nearly equilateral triangles.

Delauney surface subdivision style

Subdivision Limits

For Grid or Tree subdivisions, the limits control the number of recursive decompositions that are performed during tessellation.

Minimum Subdivision Levels: Sets the minimum number of recursions. Default=0.
Maximum Subdivision Levels: Sets the maximum number of recursions. The maximum can be no greater than 7. Be careful: setting the maximum greater than 5 can result in massive face counts and poor performance. Default=3.

Maximum Number of Triangles

For Delaunay subdivision, the Maximum Number of Triangles lets you specify the maximum number of triangles into which the surface will be divided. Default=20000.