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.