Prepare a NURBS surface for conversion to a subdivision surface
 
 
 

When you are ready to convert a NURBS surface to a subdivision surface, see Convert a NURBS or polygonal surface to a subdivision surface.

Some NURBS properties do not convert

If you create subdivision surfaces from the following types of NURBS surfaces, you may get unexpected results.

Consider converting to a polygon mesh first

A subdivision base mesh created from NURBS will probably be too dense, and NURBS models are typically made of different surfaces that must be converted individually and then attached.

By using Modify > Convert > NURBS to Polygons first, you can reduce and attach the polygon mesh before converting to a subdivision surface.

Use the following options with Modify > Convert > NURBS to Polygons > to convert NURBS surfaces to a polygon mesh suitable for use as a subdivision base mesh:

If you converted multiple NURBS surfaces, use Mesh > Combine to merge them into a single polygon mesh. Then use Edit Mesh > Mergeor Edit Mesh > Merge Edge Tool to merge internal border edges. To show border edges clearly, choose Display > Polygons > Custom Polygon Display > and turn on Border Edges.

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