Converts VDAFS file to DXF file (in 3DFACE entities) and generates the NC program for milling a piece composed from 3DFACE entities, by some paths parallel to the machine axis. In VDAFS file will be interpreted the entities of type PSET, FACE (created from the entities of type SURF and CONS) and possibly those of type SURF. 3DFACE entities may result also from 3DFACE or 3DMESH entities from DXF files, from STL ASCII files generates by AutoCAD for solids and from RCAD '3DFace' command. 3DFace entities which describe the surface can be intersected or not perfectly joined! The milling cutter with semispherical head will be always above and tangent to the assembly of 3DFace entities! You can divide the piece into 2 parts through a horizontal separation plane or through a certain separation surface and you can calculate 3D area, volume and center of gravity of some bodies limited by 3DFACE entities. RCAD graphic core, distributed together with VDAFS to DXF&NC, provides OpenGL real-time orbit, pan, zoom, shading, lighting and motion path animation.