User guide

349
Control (UI) Default Value Function
sides 2 When set to 2, subsequent surfaces are considered two-
sided and both the inside and the outside of the surface
are visible. When set to 1, subsequent surfaces are
considered one-sided and only the outside of the surface
is visible.
shadinginterpolation smooth Controls how values are interpolated between shading
samples (usually across a polygon). When set to
constant the color and opacity of all the pixels inside the
polygon are the same. This is often referred to as flat or
faceted shading. When set to smooth the color and
opacity of all the pixels between shaded values are
interpolated from the calculated values. This is often
referred to as Gouraud shading.
matte No Matte objects are the functional equivalent of three-
dimensional hold-out mattes. Matte objects are not
shaded and are set to be completely opaque so that they
hide objects behind them. However, regions in the
output image where a matte object is visible are treated
as transparent.
opacity [ 1.0 1.0 1.0 ] Sets the current opacity. The color component values
must be in the range [0,1]. Normally there are three
components in the color (red, green, and blue), but this
may be changed with RiColorSamples. If the opacity is 1,
the object is completely opaque; if the opacity is 0, the
object is completely transparent.
color [ 1.0 1.0 1.0 ] Sets the current color. Normally there are three
components in the color (red, green, and blue), but this
may be changed with the color samples request.
scopedCoordinateSystem N/A Marks the coordinate system defined by the current
transformation with a given name, and saves it to a
separate stack, independent of the global list maintained
by RiCoordinateSystem. This stack is pushed and
popped using RiAttributeBegin and RiAttributeEnd.
5 NODES L-Q | PRMANOBJECTSETTINGS