IMPORTANT: When RenderMan 22 is released, the RenderMan 20 and 21 user documentation covering the renderer and bridge products will be retired to a download package. It will not be live on the website to avoid confusion between versions.

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An LPE group (lpegroup) allows us to specify which objects we want to be use for an LPE channel. The attributes can be added in RenderMan plugins using the software's menu system such as PrmanObjectSettings in Katana.