Presenting the Massive Worlds Toolkit !
By popular demand of both Patrons and Clients,
Presenting a Houdini centric Framework for massive open world generation in Unreal Engine 5.3 – 5.5*.
Providing a new, powerful & liberating pipeline for open world building, the “Massive Worlds” toolkit empowers you to use your Houdini Digital Assets with Unreal, at a scale and at a level of integration that’s simply wasn’t possible before.
With the Massive Worlds Toolkit you will be able to create, manage and operate a Houdini based World Partition Landscape Pipeline in the Unreal Engine 5. It is based on nearly a decade of experience crafting massive open worlds for video games and employs some of the best practices I know.
Leveraging Unreal 5 features, such as Landscape Edit Layers, Landscape RVT and PCG spawning, this set of Houdini and Unreal tools will empower your pipeline, allowing you to procedurally shape your worlds in the Unreal Engine like never before.
Available versions
HOW TO DOWNLOAD

To get Access to the Massive Worlds Toolkit v1.1, subscribe to the Invested Tier on my Patreon Page here.
Licensing options
The Massive Worlds Toolkit is a Middleware available under a broad spectrum of Licenses, suitable for every type of use.
For Personal Non Commercial Projects:
The Massive Worlds Toolkit, is available with a Non Commercial license as a subscriber bonus to E-Houdini Academy Patrons.
This Tier 0 license is valid for use on an unlimited amount of non-commercial projects, for personal and evaluation use.
Get your Non Commercial license here.
GET ACCESSFor Commercial Projects and Studios:
Need to use the Massive Worlds Toolkit for commercial projects ?
Do you need access to the source code to customize the toolkit to your needs ?
Or do you just want to take it for a trail run ?
For commercial options, see the licensing page.
LICENSING OPTIONSMassive Worlds Workshop
Massive Worlds Workshops

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MASSIVE WORLDS TOOLKIT
GET ACCESSBenefits
- A new Houdini Centric Pipeline for Open World Construction & Data management
- A Bi-Directional, Non-Destructive Pipeline between Unreal and Houdini
- Externalized Data for Houdini
- Manageable Memory Requirements when Loading Terrain Data for tools
- Fast, Versatile, Procedural!
Featured Assets
MASSIVE WORLDS TOOLKIT
GET ACCESSRoadmap
Currently available. The toolkit contains the following features:
- A Bi-directional, Lossless Pipeline between Houdini & Unreal with full Edit Layer and Material Layer Support.
- Advanced, User Friendly Heightmap and Material Stamping nodes that integrate directly with Houdini’s Heightfield Workflow.
- Externalised Procedural Data Caches provide interoperability between tools and Data Storage outside of Unreal's environment.
- Interactive road editor, that is both Houdini and Unreal Compatible.
- Realistic, slope sensitive Path-finding Algorithm for Road Building.
- Blueprint Spline support for manually drawn Road Building.
- Advanced Road Post-Processing and Compositing for roads.
- Fully integrated Bridge and Tunnel Tool for rapid creation of highly configurable road infrastructure.
- Multi Landscape support, to allow Houdini and Unreal to handle landscapes larger than ever before.
- Props Spawner Example: Demonstrates how to use the Toolkit's full suite of data to design and distribute procedural Biomes.
- Task Manager and background computation support using the Houdini PDG.
In development:
- Composite Props tool to combine point clouds.
- PCG Based Props spawning fully compatible with world partition.
- New multi-biome, Runtime Virtual Texture based landscape material.
- Support for multiple 8 Biomes with 8 to 16 Sub-Biomes each.
- Full RVT Decal and RVT Mesh integration support.
- Fully integrated Grass system.
- Support for Ultra Dynamic Sky/Weather hook-up.
- Biome Layout Generation tools.
- Masking support to lock down.
- Perforce & Render Farm Support for the Task manager.
- Settlement Building Toolset.
- Improvements to the Terraforming Pipeline.
- Procedural road decoration tools.
- Interactive directional street name and direction Sign Tool.
Future planned improvements:
- Interactive Terrain Sculpting and Post-Processing tools using external Heightmap stamps.
- Improved Landscape Import and Export functionality for partial Landscapes
- Improved Highway Offramp and Overpass Support for the Bridge and Tunnel Tool
- Background Landscape Generation ( Custom HLODs )
- Vista Map Generation
- More general improvements throughout the Toolkit
Showcase
Testimonials
After few minutes I was able to understand how each asset worked and where each one fit in the pipeline, but I also understood the potential of this toolset.
It is not a simple toolset that allows you to exceed the size limit of the terrains in unreal, but it is a complete overhaul on how terrains of this magnitude are generated. It allows you to have a solid foundation on which to start developing your tools, expand your landscape, iterate quickly, and overcome limitations we had before.
Now the limit is what your computer's memory can support.
He is one of the most dedicated persons I've seen when it comes to mentoring and it is noticeable that he loves what he does. I hope to work with him again in the future.
We'd definitely recommend his services.
MASSIVE WORLDS TOOLKIT
GET ACCESSContact Erwin Heyms for full access licensing.