When a 3D model is edited after converting the part to ExactFlat, an ExactFlat Force Rebuild will pass new model geometry to the flattener and rebuild all pattern pieces with the new flat patterns. Optimization and remeshing may be required.
The ExactFlat addin in SolidWorks enables simultaneous work on both the 3D model and 2D pattern. In order to achieve this, ExactFlat first requires that the model is defined by creating Model Pieces. Model Pieces are Surface Bodies in SolidWorks. The flattening algorithms transform these surface models into Pattern Pieces .