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About.Ball
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1990-01-16
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About.Ball
James M. Shook
PO Box 140
Cambridge, MA 02238
BIXid:jshook
This image uses a wide selection of Silver's features.
The geometry of the objects in the scene is fairly simple. All of the
objects except the ball were made in Sculpt 3D and converted to Silver
format with InterChange from Syndesis.
There are several objects which have IFF brushes wrapped on them. The
wallpaper pattern, the markings on the plant and the rug pattern were all
created in Deluxe Paint and saved as IFF brushes.
Two built-in textures are used: the floor uses the checkerboard texture
and the ball uses the layered texture. The floor was made somewhat
reflective.
The sunlight and shadow effect was created with Silver's stencil object.
I made a 1 bit-plane image in a paint program of a window opening and
loaded that into a stencil in Silver. I positioned it out of the range of
the camera between the scene and the main light source so that the stencil
cast shadows into the scene. It took a number of tries to get the light
source and stencil in the right position to create a pleasing pattern of
shadows and sunlight in the scene. Since Silver's solid modelling mode
does not render shadows, I had to do full ray-traces to see where the
shadows fell, but I would render only a small zone of the image, and use
large-pixel trace mode to speed things up.
There are two light sources and ambient light. The main light source
was shifted to a slightly yellow shade to suggest sunlight. The ambient
light was shifted slightly to the blue range to emphasise the contrast
between the "sunlit" and shadow areas. The second light source was
positioned "behind" the stairs to create a slight rimlight on the ball to
help model the it and separate it from the background. I tried to make it
seem that the source of this light was sunlight reflected off the painted
white surface of the stair risers. This light source was made shadowless
so that it would cast light on the ball even though it was behind the
stairs.