Most, if not all, JT files contain faceted geometry to represent the model. Some JT models also include the precise boundary representation of the model using NURBS surfaces and curves. By default, only the faceted geometry is used.
Entry Name: UsePreciseGeometry
Entry Type: Boolean. Setting this registry entry to TRUE causes JT files to use the precise boundary representation of the model. The default value is FALSE, which uses the faceted geometry.