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It is possible to fix these scenes to allow them to be opened. Note that any connections to altered parameters will not be relinked.

A script called is provided to update scenes to the latest version. It is located in the scripts folder in the HtoA install directory.


For each scene-breaking release, a set of definitions is used to alter the .hip file.


Setting The Houdini Environment

Before running the script you must define the HFS environment variable or source the Houdini environment.


  1. Go to Applications on the main system drive (Macintosh HD)
  2. Go to the installed version of Houdini you wish to use
  3. Double click on the "Houdini Shell.terminal"


Here is a scene created with 0.9.2 which has a texture assigned to the Density parameter of a Spotlight's Gobo. 


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