Import STL File Dialog

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.