Tools

Auto-builds Karma materials for characters in Houdini (Solaris). Walks a folder of per-material subfolders, builds MaterialX graphs, and assigns them to meshes and GeomSubsets.

– Download the latest version from the latest Release.
– Locate your Houdini user preferences folder and the packages folder inside it (create packages if it does not exist yet):

Windows: C:/Users/<name>/Documents/houdini22.0/packages/
macOS: ~/Library/Preferences/houdini/22.0/packages/
Linux: ~/houdini22.0/packages/ (use your actual version)

Extract the zip directly into that packages folder, so you get:
houdini22.0/
└── packages/
    ├── character_mat_tool.json
    └── CharacterMaterialTool/
        ├── VERSION
        ├── python/
        ├── config/
        └── scripts/

No renaming needed - the zip is already laid out correctly.
Restart Houdini. A CGA Tools shelf tab appears with a Char Mat button.