Provides options for importing an STL file.

- Name
- Enter a name for the
3ds Max object created from the STL file. Default is the file name (without extension) or the name saved internally in the STL file.
- Weld Vertices
- Welds coincident vertices in the STL file into single vertices in the
3ds Max mesh.
- Identical Only If on, STL import uses a welding algorithm optimized for the STL format. This weld operation works by only welding vertices that occupy the same (identical) spatial coordinates in XYZ. This is up to thirty times faster than standard
3ds Max welding, and is highly recommended.
Note: 
Starting in 3ds Max 2024,
Quick Weld is renamed
Identical Only.
- Use Threshold If on, STL import uses the standard 3D Studio welding method, which can be a very slow process. Adjust the threshold to determine the size of the area which vertices must occupy to be welded. Vertices with distances equal to or less than this value are welded into a single vertex. This process makes the
Use Threshold option slower than
Identical Only.
- Auto-Smooth
- When on, applies smoothing groups to the geometry based on the specified
Smooth Angle value. Edges between faces that have an angle between them that is greater than the specified
Smooth Angle value will appear faceted in the rendered image. Edges between faces that are below the specified
Smooth Angle value are smoothed.
- Smooth Angle
- Determines the size of the smoothing angle.
- Unify Normals
- Forces the normals of all faces on each object to face the same way (usually out). If, when you render your scene, the face normals are pointing in the wrong direction, use the Normal modifier to flip them.