RIS Procedures
RIS Procedures
There are three new RiProcedures implemented for the RIS mode of PRMan. All of these procedures are valid only in RIS-mode.
RiIntegrator
The RiIntegrator procedure is used to specify an integrator (built-in or otherwise). Integrators have their own set of parameters (see the Integrator Reference) and may expect the renderer to schedule work in a particular manner.
Example:
Integrator "PxrVCM" "handle" "int maxPathLength" [18]
"int mergePaths" [1]
RiBxdf
RiBxdf is used to assign a Bxdf (and optionally, a volume) to a surface. Bxdfs take precedence over RiSurface when an integrator is active but are ignored when no integrator has been specified. As with integrators, Bxdfs have their own sets of parameters; see the Bxdf Reference for details. For details on volume integration, please consult Developing Volume Integrators.
Example:
Bxdf "PxrDisney" "dis1"
"reference color baseColor" ["mixer:result"]
"reference float roughness" ["tex1:result"]
"float metallic" [1]
RiPattern
RiPattern is used to wire in textures and patterns. As with integrators and Bxdfs, patterns have their own parameters (input and output). Consult the Pattern Reference for details.
Example:
Pattern "PxrTexture" "tex1" "string filename" ["checker.tx"]