Houdini Engine for 3ds Max
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Environment Variables
Variable Purpose
HEMAX_HDA_PATH This environment variable can set to a directory, and whenever a new Houdini session is started, all of the .hda files and .otl files found in that directory will be loaded as assets.
USE_HENGINE_ENV_IN_HOSTS This environment variable must be set on the Houdini side. When the plugin starts a new Houdini session, it will look in the HARS process for the presence of this environment variable. If USE_HENGINE_ENV_IN_HOSTS is found in the server's process, the plugin will copy every environment variable from the server process into the 3ds Max process.