The ability to add depth, or Z coordinates, to Edit Curves was added in OpenVSP version 3.27. With this parameter, users are now able to define arbitrary curves in 3D space rather than being limited to cross-section slices. This new capability provides numerous opportunities for component customization and the creation of entirely new unique geometries in OpenVSP. Users should be aware that three-dimensional curves and cross-sections are an advanced feature of OpenVSP and should be used very deliberately with production designs. In many situations, Skinning will likely accomplish the same task with more robustness to variation. Users are encouraged to test out this feature and get to know the controls and behaviors before attempting implementation into designs.