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When rendering it's usual required that you set a default pose o= r position for your object to become a reference for later renders even if = the object deforms or moves around. This is to prevent "swimming" or a text= ure effect appearing to slide across the object as it animates. It's typica= lly referred to by its technical name of Pref.
In Houdini, you can easily set a parameter using the rest node. This wil= l create a rest attribute (and optional rnml). RenderMan for Houdini will a= utomatically rename this to Pref (and Nref) for most houdini geometry. For = procedurals, this renaming does not happen, so you should rename the rest a= ttribute yourself.
In your patterns, you should use Pref (and Nref) and that is the attribu= te name that RenderMan sees.
From here your renders should use the default position and shape set by = the Rest node.