The 3D export feature can't be DXF-AAMA or DXF-ASTM format.
The export file must be developed by us, as there is too much unneeded information in the DXF files to be useful for importing into 3D applications, and doesn't include the information we will be adding in future versions of Valentina.
If it helps we can start with the DXF definition and add our own modifications, but the resulting file will no longer qualify as DXF-AAMA or DXF-ASTM.
As stated in other threads about our 3D export file over the past 3 years, here are the requirements:
* No seam allowances
* Matched seam lines between pieces (These are the instructions for how to sew the pieces together!)
* Matched passmarks (These are the instructions for inserting "ease" as gathers, tucks, etc.)
* Internal paths are included (These are the instructions for placing buttons, pockets, electronic circuitry, embroidery, etc.)
* Equal number of vertices down matched seam lines
* All pieces laid out as SVG vector images
* No overlapping pieces
The data included in Valentina patterns which are imported into 3D environments will be very different than any other pattern format file. This distinction will become even greater when we add new features to Valentina, and to allow designs changes in 3D environment which then are importable back into Valentina to create Bill of Materials, Marker Layouts, etc.
DXF-AAMA and DXF-ASTM are good for what they were designed to do, but we're shooting beyond those limitations.