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       mgf2rad  -  convert  Materials  and  Geometry  Format  file to RADIANCE


       mgf2rad [ -m matfile ][ -e mult ][ -g dist ] [ input ..  ]


       Mgf2rad converts one or more Materials and Geometry Format (MGF)  files
       to  a RADIANCE scene description.  By definition, all output dimensions
       are in meters.  The material names and properties for the surfaces will
       be those assigned in MGF.  Any materials not defined in MGF will result
       in an error during translation.  Light sources are described inline  as
       IES  luminaire  files,  and  mgf2rad  calls  the  program ies2rad(1) to
       translate these files.   If  an  IES  file  in  turn  contains  an  MGF
       description  of  the  local  fixture  geometry,  this  may  result in a
       recursive call to mgf2rad, which is normal and should  be  transparent.
       The  only  side-effect of this additional translation is the appearance
       of other RADIANCE  scene  and  data  files  produced  automatically  by

       The  -m  option  may be used to put all the translated materials into a
       separate RADIANCE file.  This is not always  advisable,  as  any  given
       material name may be reused at different points in the MGF description,
       and writing them to a separate file loses  the  contextual  association
       between  materials  and surfaces.  As long as unique material names are
       used throughout the MGF description and  material  properties  are  not
       redefined, there will be no problem.  Note that this is the only way to
       get all the translated materials into a single file, since no output is
       produced  for  unreferenced  materials;  i.e.  translating just the MGF
       materials does not work.

       The -e option may be used to multiply all the emission  values  by  the
       given  mult  factor.   The  -g  option  may be used to establish a glow
       distance (in meters) for all emitting surfaces.  These two options  are
       employed  principally  by ies2rad, and are not generally useful to most


       To translate two MGF files into one RADIANCE  materials  file  and  one
       geometry file:

         mgf2rad    -m    materials.rad    building1.mgf    building2.mgf    >

       To create an octree directly from two MGF files and one RADIANCE file:

         oconv ’\!mgf2rad materials.mgf scene.mgf’ source.rad > scene.oct

FILES Used to smooth polygonal geometry
       *.rad          RADIANCE source descriptions created by ies2rad
       *.dat          RADIANCE source data created by ies2rad     Used for IES source coordinates


       Greg Ward


       ies2rad(1), mgf2meta(1), obj2rad(1), oconv(1), rad2mgf(1), xform(1)

       MGF web site ""