In this demonstration, we will create a 3D structural model from legacy drawings, in this case, a PDF and a DWG file. We may need to model a legacy design as it will become the baseline for a future design, or we may be a shipyard or owner/operator focused on MRO, requiring a model for refit work. The ability to reuse information such as drawings, PDFs, and images makes modeling more efficient and allows us to validate the design.