RAD2MGF(1)						      General Commands Manual							RAD2MGF(1)

NAME

       rad2mgf - convert RADIANCE scene description to Materials and Geometry Format

SYNOPSIS

       rad2mgf [ -dU ] [ input ..  ]

DESCRIPTION

       Rad2mgf	converts  one  or  more  RADIANCE  scene files to the Materials and Geometry Format (MGF).  Input units are specified with the -mU
       option, where U is one of 'm' (meters), 'c' (centimeters), 'f' (feet) or 'i' (inches).  The assumed unit is meters, which is  the  required
       output  unit for MGF (thus the need to know).  If the input dimensions are in none of these units, then the user should apply xform(1) with
       the -s option to bring the units into line prior to translation.

       The MGF material names and properties for the surfaces will be those assigned in RADIANCE.  If a referenced material has not been  defined,
       then its name will be invoked in the MGF output without definition, and the description will be incomplete.

LIMITATIONS

       Although  MGF  supports	all  of the geometric types and the most common material types used in RADIANCE, there is currently no support for
       advanced BRDF materials, patterns, textures or mixtures.  Also, the special types "source" and "antimatter"  are  not  supported,  and  all
       light source materials are converted to simple diffuse emitters (except "illum" materials, which are converted to their alternates).  These
       primitives are reproduced as comments in the output and must be replaced manually if necessary.

       The RADIANCE "instance" and "mesh" types aretreated specially.  Rad2mgf converts each instance or mesh to an MGF include  statement,  using
       the  corresponding  transformation  and	a file name derived from the octree or mesh name.  (The original octree/mesh suffix is replaced by
       ".mgf".)  For this to work, the user must separately create the referenced MGF files from the original RADIANCE descriptions.  The descrip-
       tion file names can usually be determined using the getinfo(1) command run on the octrees in question.

EXAMPLE

       To convert three RADIANCE files (in feet) to one MGF file:

	 rad2mgf -df file1.rad file2.rad file3.rad > scene.mgf

       To translate a RADIANCE materials file to MGF:

	 rad2mgf materials.rad > materials.mgf

AUTHOR

       Greg Ward

SEE ALSO

       getinfo(1), ies2rad(1), mgf2meta(1), mgf2rad(1), obj2rad(1), oconv(1), xform(1)

       MGF web site "http://radsite.lbl.gov/mgf/HOME.html"

RADIANCE
							      5/15/95								RAD2MGF(1)