Guide to Using DWG and Other Formats
Guide to Using DWG and Other Formats
Guide to Using DWG and Other Formats

ACIS

AutoCAD's 3D Modeling Kernel, ACIS

MicroStation uses the Parasolid 3D Modeling kernel when solid models are incorporated into a design. However, when a DGN file containing 3D solids is saved to a DWG file, or a 3D DWG file is opened in MicroStation, the ACIS kernel is used to ensure accuracy and compatibility.