Extrusion Pro for Gena Pro

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The perfect tool for tunnels, walls, sidewalks and more!

Extrusion Pro is the ideal solution for creating a mesh along a spline.

The traditional way to make a curved wall or a tunnel would involve creating a mesh in a 3D modeling application outside of Unity, and then importing into into Unity. Then, whenever it needs to be changed, it needs another roundtrip to and from the 3D modeling application.

With Extrusion Pro's easy-to-use cross section editor, you can quickly and easily create the perfect shape for your mesh, and have it generated along a spline all without leaving Unity. You have full control over the UV-mapping and texturing along the extruded mesh with the integrated UV-map Editor.

When combined with the object spawning and terrain editing capabilities of the GeNa Pro spline system, you now have another powerful tool to tackle your level design challenges.

How it works

  1. Attach the Extrusion Pro extension to a GeNa Pro Spline.
  2. Define the shape of your extruded mesh with the Cross Section Editor.
  3. Add new spline nodes in your environment and watch it update in real time.

The extruded mesh will be generated along your spline and show your edits, including complex intersections, and update them in real time!

Main Features

  • UV Editor - control UV layout, tiling and modes.
  • Live Editing/Preview - realtime preview editing of extrusion mesh.
  • Cross-Section Editor - advanced control over mesh points and normals.
  • Support for intersections when using 'properly formed' cross sections.
  • API / runtime support - runtime manipulation of extrusion system.

Note: A 'properly formed' Cross Section means that it has a floor (for each shell, however small) at the bottom that crosses over X=0.0. It also has the same number of points on either side of the center X (x=0.0) and the UV's are mirrored on the points across the center X (this is less important for 'cave-like' structures).

Full Render Pipeline Support

The Extrusion Pro Plugin works in builtin, URP and HDRP.

Please note: The art assets like flowers, trees, forklift, etc. visible in the screenshots are shown for illustration purposes and are not part of the package.

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About Procedural Worlds:

At Procedural Worlds our mission is to empower people to create, automate and navigate worlds. Our products are easy to use, nicely integrated and well supported.

We service indies, professionals and enterprise with our tools, and deliver custom projects for studios, enterprise and government. Our special power is that we have both a deep procedural technology stack, and an amazing team of experts, and we leverage this unique combination to create applications, games, sims, mapping and mmo / metaverse experiences at a fraction of the typical time and cost. Check out our gallery, and then contact us.

We are a Unity Partner, Intel Partner, and have been a top asset store publisher since we first launched Gaia in 2015. Our reviews over this time speak for themselves.

Our Products:


World Building Bundle - 2021 Edition - Get another 20% off our most popular tools with this awesome bundle. It includes Gaia Pro 2021, Gena Pro, Ambient Sounds, Pegasus and SECTR 2019.


Gaia Pro 2021 - Gaia 2 is an introductory version of Gaia Pro. Gaia 2 expands on the original Gaia 1 with multi terrain and biome support.

GeNa Pro - GeNa Pro os the big brother of GeNa 2. It is a complete re-write, and includes all of the capability of GeNa 2 plus the ability to create splines, rivers, roads and villages and to shape and fill your terrain with rocks, trees grasses and more.

SECTR Complete 2019 - A suite of performance-enhancing tools that enable open world streaming, massive mobile games and includes the latest techniques in audio occlusion and propagation.

Ambient Sounds - A tool that creates interactive soundscapes that also comes with professionally composed sound effects and music library.

Pegasus - A system that can drive anything along a path. Great for cut-scenes, and even has an ambient ai that supports formations, animation and local avoidance for your NPCs and animals!

Stamp Packs

As the intentor of the stamp concept, and obsessive landscape creators, we know a thing or two about stamps. Check out our Stamp Packs for a range of landscapes that work with Unity, our tools, and anyother tool that supports the stamp concept.

Game Ready Levels

If you have our tools, and would like some optimised levels to build your game around, or learn from then check out our Game Ready Levels.

Micro Biomes

Micro Biomes are small biomes that are designed to be mixed and matched to create more interesting environments with Gaia Pro 2021 and GeNa Pro.

Procedural Spawner Packs

We take some of the best modular assets in the store and make it easy for you to use them in your scene with Gaia Pro and GeNa Pro and our Procedural Spawner Packs. Bring your artistic vision to life and procedurally create in minutes what would take weeks or months by hand!

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Upgrade Policy:

Every year as we further develop our products we may charge an upgrade fee of 20-50% of the full purchase price for the next major release of our software. Our updates are done in sync with the yearly Unity release cycle i.e. 2020, 2021, 2022 etc.

You are not obliged to upgrade to newer versions of our products and your product will continue to work on the Unity release it was targeted at, however, old versions of our products will not be supported on new versions of Unity.

Upgrades support the team so that we can continue to support our products and you.