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Reuse AutoCAD LT 2D CAD data in Inventor LT to start designing in 3D. Realize the benefits of 3D design while continuing to rely on the 2D designs and expertise you have built up over time. If you prefer, maintain your current 2D productivity by using AutoCAD LT. Inventor LT also offers DWG™ interoperability, so you can work with existing 2D designs in a 3D environment.