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CHAPTER 9 Multimedia Features
KEY TYPE VALUE
AC array (Optional) An array that specifies the auxiliary color to be used
when rendering the 3D image. The first entry in the array is a color
space; the subsequent entries are values specifying color values in
that color space. The interpretation of this entry depends on the
render mode specified by the Subtype entry, but it is often used to
specify a color for drawing points or edges.
The only valid color space is DeviceRGB. If a color space other
than DeviceRGB is specified, this entry is ignored and the default
value is used.
Default value: [/DeviceRGB 0 0 0] representing the color black.
FC name or (Optional) A name or array that specifies the face color to be used
array when rendering the 3D image. This entry is relevant only when
Subtype has a value of Illustration.
If the value of FC is an array, the first entry in the array is a color
space and the subsequent entries are values specifying values in that
color space. The only valid color space is DeviceRGB. Any color
space other than DeviceRGB is ignored and the default value is
used.
If the value of FC is a name, it should describe a color. The only val-
id name value is BG, specifying the current background color in use
for displaying the artwork. If a name other than BG is encountered,
this entry is ignored and the background color for the host annota-
tion is used (see Table 8.40 on page 642).
Default value: BG
O number (Optional) A number specifying the opacity of the added transpar-
ency applied by some render modes, using a standard additive
blend.
Default value: 0.5
CV number (Optional) A number specifying the angle, in degrees, to be used as
the crease value to be used when determining silhouette edges. If
two front-facing faces share an edge and the angle between the nor-
mals of those faces is greater than or equal to the crease value, then
that shared edge is considered to be a silhouette edge.
Default value: 45
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