Graphics Programs Reference
In-Depth Information
Tip
There are many websites where you can find HDR images that you can
download for free. The following list names just a few:
http://www.debevec.org/Probes/ (the website of Paul Debevec, the
inventor of the HDRI technique)
http://www.wiredchild.net/portold/resource.htm
http://www.yboo.net/hdri/
http://www.hdrmill.com/Freebies.htm
http://www.cgindia.org/2006/06/download-58-free-hdri.html
After several attempts, a satisfactory initial lighting setup was achieved (this is
the product of the illumination from the Area light and from the HDR image;
see Fig. 12.22).
FiG 12.22
Initial lighting: The shadow
quality is extremely convincing.
Stage 12: Setting Up Supplementary Lighting in
Cheetah3D
Objective
: To set up accent lighting for the interior shots.
Data
: Cheetah scene created in the previous stage.
Tool
: Cheetah3D.
At first glance, the interior illumination seems to be pretty simple: The main
source of illumination is the sky and the sun. This may be true, but there are light
sources everywhere in the space itself that add ambience, accent, and atmos-
phere - probably around 40 in total, and among them are spotlights, uplighters,
and neon tubes. In Figure 12.23, each red spot represents a single luminaire. You
can see the results of all this combined lighting in the second picture.
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