Editing Recipes for Using Creo View MCAD Adapters > Performing Recipe Editor Tasks > Enabling Hierarchical Visual Navigation
  
Enabling Hierarchical Visual Navigation
The Thumbnail generator creates 3D Thumbnail (*.PVT) files during the publishing of CAD assemblies using one of the following Thumbnail Generator configurations:
• By Worker—The worker calls PVSTHUMB after generating the viewables.
• By Loader—Pre-converted viewables are uploaded by the WVS Loader on to a new WVS representation. 
• By Worker Agent—The WVS Loader  is configured to use a worker of type THUMBNAIL.
To configure the WVS or the CAD Worker to automatically generate the required 3D Thumbnail Images, follow the steps below, depending on the method you are using:
• By Worker
1. Set the Sub-thumbnail level option in the Miscellaneous Parameters for the Creo View Thumbnail Generator tab for the Thumbnail Generator to -1.
2. In the CAD worker’s Advanced > System tab, next to Thumbnail Recipe, browse to the thumbnail generator recipe file that you created.
• By Loader
1. Set the Sub-thumbnail level option in tthe Miscellaneous Parameters for the Creo View Thumbnail Generator tab for the Thumbnail Generator to -1.
2. Modify the PVSTHUMB command-line arguments, defined in the thumbnail.generator.nativecmd property value in wvs.properties, to point to the modified thumbnail generator recipe file. For example:
xconfmanager -p -t <path1>/wvs.properties -s "thumbnail.generator.
nativecmd=<Windchill>\wvs\bin\pvsthumb -r <path2>\<name>.rcp -vc -vL $
(wt.logs.dir)\thumbnail3d.log"
where:
<path1> is the path to where the wvs.properties file is located for your release.
<Windchill> is the Windchill home folder path.
<path2>\<name> is the path or name of the newly created thumbnail generator recipe file.
• By Worker Agent If using a Thumbnail Worker (thumbnail.usecadagent=true in wvs.properties):
Modify the settings in the pvsthumb.rcp that resides in the THUMBNAIL worker's setup folder to include the  Sub-thumbnail level set to -1 (all levels).
This should ensure that the 3D Thumbnail Images are generated for all newly published Creo View Representation structures and by Thumbnail regeneration WVS Scheduler Jobs.