Use this page to adjust the options for the STL file reader.
Specifies the type of units Autodesk Navisworks uses when opening STL files.
Normals control how objects appears when lit. By default, this check box is clear, and the file reader uses the data provided in the STL file, giving the most accurate visible results.
Select this check box if you want Autodesk Navisworks to ignore the normals, and generate the lighting data instead, for example when the supplied model contains invalid lighting data.