nurbspatch - Arnold for Katana
The nurbspatch scenegraph location, in addition to the usual built-in attributes specified for the location by Katana and arbitrary user data ( geometry.arbitrary.* ), KtoA supports the following:
geometry.point.Pw: you may use this 4-component float point version to specify control points intead ofgeometry.point.Pgeometry.point.Pref: three floats per control point, specifying a reference pos for use in sticking projective texture/noise/etc to the patch through animation.
The standard attributes geometry.trimcurves, geometry.uSize, and geometry.vSize are ignored (the latter two are inferred from the number of control points, knots, etc).
Note:
Note that displacement parameters (set on ArnoldObjectSettings) are also honored for nurbs patches.