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bake:activeudimsstringemptyActive udims for Integrator baking of texture atlases. Lists and ranges of udims can be provided in the string, for example: Attribute "bake" "string activeudims" "1001,1003,1005-1006". The default is "" which means all udims get baked.
bake:udimresolutionsstringemptyUdim texure resolutions for Integrator baking of texture atlases. Lists and ranges of udims can be provided in the string, for example: Attribute "bake" "string udimresolutions" "1001 512 512 1002,1003 64 32 1005-1006 16 16" If the string is empty (the default) then the Display Format resolution will be used.
grouping:idint0Grouping id used for raytrace disambiguation purposes. Value range: 0 to 15.
grouping:membershipstringemptyGrouping membership used for linking.
identifier:idint0Lower 32 bits of 64 bit object id.
identifier:id2int0Upper 32 bits of 64 bit object id.
identifier:lpegroupstringemptyGrouping membership used for light path expressions.
identifier:namestringemptyObject instance name.
stats:identifierstringemptyIdentifier string used by the stats system when referring to this instance.


curves:widthaffectscurvatureint1Indicates whether curve width should be used when computing curve curvature. If turned off, only the curvature along the curve spline will be calculated.
lightfilter:subsetstringemptyActive light filter groups in lighting.
lighting:excludesubsetstringemptyExclude light groups from lighting.
lighting:muteint0Mutes light emission.
lighting:subsetstringemptyLight groups active in lighting.
Ri:Matteint0Indicates matte object.
Ri:ReverseOrientationint0Flip shading normals.
Ri:Sidesint2Geometry can be one or two sided.
shade:indexofrefractionfloat-1Override material IOR for nested dielectrics.
shade:minsamplesint1Min Pixel Samples. For fine-tuning adaptive sampling.
shade:relativepixelvariancefloat1PixelVariance multiplier for camera visible objects. For fine-tuning adaptive sampling.
trace:holdoutint0Indicates holdout object.
trace:intersectpriorityint0Raytrace intersection priority for nested dielectrics. Value range: 0 to 31.
trace:maxdiffusedepthint1Maximum diffuse light bounces.
trace:maxspeculardepthint2Maximum specular light bounces.
trace:reflectexcludesubsetstringemptyExclude object groups from reflections.
trace:reflectsubsetstringemptyObject groups visible to reflections.
trace:shadowexcludesubsetstringemptyExclude object groups from casting shadows.
trace:shadowsubsetstringemptyObject groups active in shadows.
trace:transmitexcludesubsetstringemptyExclude object groups from refractions.
trace:transmitsubsetstringemptyObject groups visible to refractions.
visibility:cameraint1Indicates if object is visible to camera rays.
visibility:indirectint1Indicates if object is visible to indirect (reflection and refraction) rays.
visibility:transmissionint1Indicates if object is visible to shadow rays.