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When rendering it's usually required that you set a default pose or 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 texture effect from appearing to slide across the object as it animates. It's typically referred to by its technical name of Pref.

In Houdini / Solaris, first add a Rest node to set your default pose

In your Solaris network, add a copyproperty node and set as per the image below.

Add a _Pref AOV from the rendermanrendersettings node under Image Output → Render Vars → Integrator

Fire off a viewport or disk render and in the AOV display, you will now see the _Pref AOV

From here your renders should use the default position and shape set by the Rest node.