| NAME | TYPE | DESCRIPTION |
|---|---|---|
ARNOLD_PLUGIN_PATH | Arnold | The path of directories where HtoA looks for shaders and procedurals. |
ARNOLD_LICENSE_HOST | License | License server name (Default: localhost) |
ARNOLD_LICENSE_PORT | License | RLM port (Default: 5053) |
DYLD_LIBRARY_PATH | System (Mac) | |
HOUDINI_DSO_ERROR | Houdini | Prints any error related to loading the HtoA plugin on the command line. |
HOUDINI_EXTERNAL_HELP_BROWSER | Houdini | Opens the help URLs in the default system browser rather than Houdini's own. |
HOUDINI_PATH | Houdini | The path of directories where Houdini looks for configuration files (including HtoA). |
HOUDINI_ROOT | HtoA | Path to Houdini location |
HOUDINI_SCRIPT_DEBUG | Houdini | Enables more verbose console output. |
HOUDINI_SOHO_DEVELOPER | Houdini | Enables more verbose console output. |
HOUDINI_USE_HFS_PYTHON | Houdini | Forces the use of Houdini's built-in version of Python. |
HTOA | HtoA | Path to HtoA location |
HTOA_DEBUG | HtoA | Python debugging mode. |
HTOA_PLUGIN_PATH | HtoA | The path to the location where HtoA should search for shaders. |
HTOA_PROCEDURAL_PATH | HtoA | The path to the location where HtoA should search for procedurals. |
LD_LIBRARY_PATH | System (Linux) | |
PATH | System (Windows) | The path of directories where Houdini looks for configuration files (including HtoA). |
RLM_LICENSE | License / System (depreciated) | Contain a list of multiple servers/ports. This is for the legacy RLM based license server |
solidangle_LICENSE | License / System (depreciated) | Contain a list of multiple servers/ports. This is for the legacy RLM based license server |
| ADSKFLEX_LICENSE_FILE | Autodesk Network Licenesing | Contains a list of servers/ports, for more information see Connecting to the Autodesk NLM |
Houdini environment variables
You can use the hconfig command-line utility to display all Houdini environment variables. Here are those relevant to HtoA, set them in houdini.env or in a wrapper script:
HOUDINI_EXTERNAL_HELP_BROWSER
This documentation you are reading is linked in the HtoA components inside Houdini, so that when you click the help button or press F1, the appropriate page shows in your browser.
However, the default Houdini help browser does not support the HTTPS secure protocol necessary to access the Solid Angle support and documentation server. Let's define the command to open the help URLs in the default browser on the system:
Linux:
HOUDINI_EXTERNAL_HELP_BROWSER = xdg-open
Windows:
HOUDINI_EXTERNAL_HELP_BROWSER = start
Mac:
HOUDINI_EXTERNAL_HELP_BROWSER = open
HOUDINI_DSO_ERROR
Setting this environment variable will print any error related to loading the htoa plugin on the command line, which is very useful to diagnose installation issues:
HOUDINI_DSO_ERROR = 2
HOUDINI_SCRIPT_DEBUG & HOUDINI_SOHO_DEVELOPER
These environment variables are useful to the HtoA developer, and enable more verbose console output and additional features in Houdini. Please refer to the Houdini documentation for details.
HOUDINI_SCRIPT_DEBUG = 1 HOUDINI_SOHO_DEVELOPER = 1
HOUDINI_USE_HFS_PYTHON
If you are getting errors such as these:
PyClerk[i3dclerk]: Cannot import traceback module to generate backtrace. PyClerk[i3dclerk]: No getName() method found PyClerk[ifdclerk]: Cannot import traceback module to generate backtrace. PyClerk[ifdclerk]: No getName() method found PyClerk[miclerk]: Cannot import traceback module to generate backtrace. PyClerk[miclerk]: No getName() method found PyClerk[ribclerk]: Cannot import traceback module to generate backtrace. PyClerk[ribclerk]: No getName() method found
Then you might be using the wrong Python version, probably one installed on your system when HtoA needs Python 2.6. You can fix this by forcing the use of Houdini's built-in version of Python:
HOUDINI_USE_HFS_PYTHON = 1
HOUDINI_PATH
To enable HtoA, append this line for the user:
HOUDINI_PATH = /path/to/htoa/htoa-0.8.3;&
HOUDINI_PATH = "C:/path/to/htoa/htoa-0.8.3;&"
HOUDINI_ROOT
Path to the Houdini install directory.
HOUDINI_ROOT="/opt/hfs12.5.427"
Arnold for Houdini environment variables
HTOA
HTOA="/path/to/htoa/htoa-0.8.3"
HTOA_DEBUG
The HtoA python debugging mode. This enables the reloading of all Python modules so that changes to the HtoA Python modules are immediately seen in Houdini, at the expense of performance. The debug mode is triggered when HTOA_DEBUG is set to 1 and set to optimized mode by default.
HTOA_DEBUG = 1
HTOA_PLUGIN_PATH
The path to the location where HtoA should search for shaders.
HTOA="/path/to/htoa/htoa-0.8.3/arnold_plugins"
HTOA_PROCEDURAL_PATH
The path to the location where HtoA should search for procedurals.
HTOA="/path/to/htoa/htoa-0.8.3/arnold_procedurals"
HTOA_STARTUP_LOG
Setting this environment variable to 0 will disable the shader registration log messages at startup.
Arnold Core environment variables
Arnold Licensing environment variables
This is a legacy guide for the now depreciated RLM licensing for help with the Autodesk Network licensing and user-sign licensing see the guide here
Arnold uses a floating-license mechanism based on RLM. On the client machines, Arnold will try to use the localhost as the license server.
ARNOLD_LICENSE_HOST
If your license server is in a different machine, you will need to set the ARNOLD_LICENSE_HOST environment variable and point it to the license server name.
ARNOLD_LICENSE_PORT
It will also try the default RLM port (5053). If you have changed the port in the license file, you must also set the ARNOLD_LICENSE_PORT environment variable so that it matches the port in the license file.
solidangle_LICENSE & RLM_LICENSE
Contains a list of multiple servers/ports in the following format:
server1:server2:server3:...:server<N>
server1;server2;server3;...;server<N>
where server<N> can be port@host or host@port (the port is optional and defaults to 5053).
System
PATH
Additional setting for enabling HtoA on Window.
PATH = "C:/path/to/htoa/htoa-0.8.3/scripts/bin;$PATH"