GGro is a free Houdini add-on created by Gio Gargiulo. It is distributed as a set of Houdini Digital Assets designed to generate procedural organic growth structures. The tool is currently in beta and available at no cost via Gumroad. GGro is intended to create growth-based structures such as coral-like forms, branching organisms, fungal shapes and other biologically inspired geometries. The system operates entirely inside Houdini and does not rely on external solvers or third-party dependencies.
Nodes, solvers and scope
The add-on consists of multiple custom nodes grouped into solvers, influence nodes and utility tools. These are used to control how geometry grows over time, how it reacts to attractors or obstacles, and how the resulting structures are managed downstream in a SOP network.
The solvers drive the growth behaviour itself. Influence nodes modify direction, density and interaction. Utility nodes handle tasks such as meshing and organisation of the generated geometry. Exact implementation details are not documented beyond the node descriptions provided with the download and a wiki, that you can find HERE. Behaviour beyond the supplied examples is Not independently verified at press time.
Installation and compatibility
GGro is installed by placing the supplied package files into Houdini’s packages directory. Once loaded, the nodes appear inside Houdini like standard HDAs and can be wired into existing procedural setups.
No minimum Houdini version is specified on the official site. Platform support is not explicitly stated. GPU usage, performance characteristics and memory behaviour are not documented in the available material.
Intended users and use cases
The author positions GGro primarily toward motion design and experimental procedural work. Example imagery shows abstract organic structures rather than production-specific assets. There are no claims regarding suitability for VFX shots, asset pipelines or simulation replacement. GGro does not claim physical accuracy. It should be understood as a procedural growth generator rather than a biological or scientific simulation.
Current limits
As the tool is labelled beta, node behaviour, naming and stability may change without notice. There is no published licence text beyond the statement that the tool is free. Commercial usage terms are not clearly defined in the available sources. As with all new procedural tools, artists are advised to evaluate stability, performance and reproducibility before introducing GGro into active production pipelines.
GGro official site
https://giogargiulo.com/ggro
