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PC World 1999 July
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spirit.txt
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1999-05-05
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TITLE: spirit
NAME: Bernd Sieker
COUNTRY: Germany
EMAIL: bsieker@techfak.uni-bielefeld.de
WEBPAGE: --
TOPIC: history
COPYRIGHT: I SUBMIT TO THE STANDARD RAYTRACING COMPETITION COPYRIGHT.
JPGFILE: spirit.jpg
ZIPFILE: spirit.zip
RENDERER USED:
Blue Moon Rendering Tools 2.4.0.3 (2.4c)
(http://www.bmrt.org/)
TOOLS USED:
mops
(http://www.informatik.uni-rostock.de/~rschultz/mops/) for
modedlling
The Gimp (http://www.gimp.org/) for making the texture and
adding copyright tag to the final image
RENDER TIME:
about 34 hours.
HARDWARE USED:
Intel Celeron 412 MHz, 128 MB RAM, NetBSD-1.4_BETA
IMAGE DESCRIPTION:
Nothing particular exciting; this image shows the Spirit of St.
Louis, the Ryan aircraft of Charles Lindbergh, on its flight acress
the Atlantic from New York to Paris. It is believed that this flight
and Lindbergh's following PR campaign in the US was historically
very important for the development of commercial aviation.
DESCRIPTION OF HOW THIS IMAGE WAS CREATED:
All modelling was done with mops, although still in beta stage this
modeller is already quite capable. It produces RIB (RenderMan
Interface Bytestream) output suitable for BMRT and PRMan.
Rendering was done with BMRT 2.4.0c.
GEOMETRY
~~~~~~~~
Most of the geometry consists of NURB patches that were created
using the "Build From Curves" function in mops. The engine cylinders
are mostly created from CSG objects and some "sweep" NURB objects
for the fuel and exhaust pipes, although these are not clearly
visible in the final image.
The sea under the plane is a simple bilinear patch, the wave
patterns on it are created by a displacement shader.
SHADERS
~~~~~~~
This time I did not write any custom shaders but could get along
find with only more or less 'standard' shaders that can be found on
the web. RenderMan shaders are small programs written in the
'RenderMan Shading Language', where almost anything in texturing and
deforming geometry is possible.
I used one custom-painted image map to project the Label on the
front part of the aircraft's fuselage.
RENDERING
~~~~~~~~~
The image was rendered using Larry Gritz' splendid Blue Moon
Rendering Tools, using a volume shader for the atmosphere effects,
two area light sources, motion blue and radiosity. The latter is
barely visible in the resulting image, but for some scenes it can
greatly improve realism.
Peak memory usage of the renderer during rendering was only 28 MB.