The RenderMan Interface - Paul Bourke

Renderers may additionally produce “images” consisting of arbitrary data, by using a
mode that is the name of a known geometric quantity or the name of a shader output
variable. Note also that multiple display channels can be specified, by prepending
the + character to the name. For example,
RiDisplay (”out.tif,” ”file,” ”rgba”, RI NULL);
RiDisplay (”+normal.tif,” ”file,” ”N”, RI NULL);
will produce a four-channel image consisting of the filtered color and alpha in out.tif,
and also a second three-channel image file normal.tif consisting of the surface normal
of the nearest surface behind each pixel. (This would, of course, only be useful if
RiQuantize were instructed to output floating point data or otherwise scale the data.)
Display options or device-dependent display modes or functions may be set using
the parameterlist. One such option is required: ”origin”, which takes an array of two
RtInts, sets the x and y position of the upper left hand corner of the image in the
display’s coordinate system; by default the origin is set to (0,0). The default display
device is renderer implementation-specific.
RIB BINDING
Display name type mode ...parameterlist...
EXAMPLE
RtInt origin[2] = { 10, 10 };
RiDisplay (”pixar0”, ”framebuffer”, ”rgba”, ”origin”, (RtPointer)origin, RI NULL);
SEE ALSO
RiFormat, RiQuantize
4.1.3 Additional options
Option Type Default Description
Hider token ”hidden” The type of hidden surface algorithm that
is performed.
Color Samples integer 3 Number of color components in colors.
The default is 3 for RGB.
Relative Detail float 1.0 A multiplicative factor that can be used to
increase or decrease the effective level of
detail used to render an object.
Table 4.4: Additional Options
The hider type and parameters control the hidden-surface algorithm.
RiHider ( RtToken type, ...parameterlist...)
34