Packages - Radiance
Purpose and General Description
"Radiance is a suite of programs for the analysis and
visualization of lighting in design."
"Radiance is used by architects
and engineers to predict illumination, visual quality and appearance of innovative design spaces, and by
researchers to evaluate new lighting and daylighting technologies."
"Radiance includes many of the features of popular computer graphics rendering programs with the
physical accuracy of an advanced lighting simulation."
Radiance is used by the
in the UK, who have some Radiance images online.
Input Formats Accepted
"Input files specify the scene geometry, materials, luminaires,
time, date and sky conditions (for daylight
These files are Radiance's own format.
Translators to Radiance from the
"IES standard luminaire data format and
AutoCAD's DXF format (version 10) are
included with the distribution."
Translators to Radiance from other CAD formats
and some image formats are also available.
Output Formats Generated
The resulting output is an image.
The reference manual mentions an AED 512 graphics terminal
and an X-window server.
Translators to other image formats are available.
QuickTime VR movies and objects
have also been generated
with Radiance on a Macintosh.
Radiance is available on Unix systems and requires an
8 bit colour display. The rendering programs
are very compute intensive.
have been written by Paul Bourke and his associates at Auckland
University in New Zealand, including a 3-dimensional editor that
produces Radiance scene descriptions as an export option."
"A few of the programs rely on interprocess
communication or the presence of the C-shell
interpreter, but the majority will run unmodified on non-UNIX systems, and have even been ported to a
DOS (386) environment"
The package includes programs for modeling and translating
scene geometry, luminaire data and material properties.
The lighting simulation itself uses ray tracing
techniques to compute radiance values.
Reflections can include specular and diffuse components.
The package can use low resolution output images for
speed or high resolution for accuracy.
Supplier and Cost
Radiance is available from the
main ftp distribution
It is free but not public domain - there are conditions in the README file.
Information last updated on 2 December 1997
Virtual Environments Visualisation