#include <volpack.h>

       vpResult
       vpStoreRawVolume(vpc, fd)
           vpContext *vpc;

These functions are  used  to  store  volume  data  structures  from  a
       rendering  context  into  files  in the format read by the VolPack file
       reading routines (see vpLoadRawVolume(3)).

       vpStoreRawVolume creates a 3D voxel  array  file.   The  file  includes