Our verdict: Houdini is the procedural tool behind much of the film and game industry's smoke, fire, destruction and water, and its node-based workflow makes every step editable. Houdini Apprentice gives you nearly all of Houdini FX for free, but only for personal, non-commercial work, with watermarked renders capped at 1080p. The learning curve is steep and the hardware demands are high.
About Houdini
Houdini is 3D animation and visual effects software from SideFX, founded in 1987 as Side Effects Software. Everything is built from node networks, so models, simulations and effects stay procedural and can be changed at any step. It covers modeling, KineFX character animation, crowds, terrain, Pyro smoke and fire, cloth, fluids and destruction, the Solaris USD environment and the Karma renderer. Houdini Digital Assets package tools that Houdini Engine can load into Unreal, Unity, Maya and 3ds Max.
Houdini Apprentice is a free version of Houdini FX for students, artists and hobbyists making personal non-commercial projects. It has virtually all features, but saves to its own .hipnc format, renders up to 1920x1080 with a wordmark on most output formats, does not work with third-party renderers and cannot be mixed with commercial versions in a pipeline. Its license is a 30-day license that renews automatically, so it needs an internet connection once a month. Commercial work needs a paid license; Houdini Indie, for creators earning under $100,000 a year, costs $299 for a one-year rental.
What it does well
- Procedural node workflow. Build models, effects and scenes as node networks that stay editable.
- Simulations. Pyro smoke and fire, cloth, fluids and destruction effects driven by nodes.
- Solaris and Karma. USD-based lighting and layout with the physically based Karma renderer.
- Houdini Digital Assets. Package procedural tools and load them into Unreal, Unity and other apps.
- KineFX and crowds. Character rigging and animation with KineFX, plus crowd simulation tools.
Who it is for
Good fit
Students and hobbyists learning procedural 3D, VFX and game tools, and artists building a portfolio for studio work.
Look elsewhere
Anyone who wants to sell work made in the free edition, beginners wanting quick results, and PCs with weak GPUs.
Pros and cons
Pros
- Nearly all Houdini FX features free for learning
- Industry-standard simulations and procedural tools
- Fully editable node-based workflow
- Files move to Houdini Education at school
Cons
- Apprentice is non-commercial only, with watermarked renders up to 1080p
- Steep learning curve, even for experienced 3D artists
- High hardware requirements, including a 12 GB GPU
How to install Houdini
Log in or register a free SideFX account on the official download page, then run the Houdini installer. On first launch keep "Install my free Houdini Apprentice license" selected and click Next. Houdini 22 needs Windows 11, a CPU with AVX2, 16 GB of RAM and a graphics card with 12 GB of VRAM, according to SideFX.
Questions about Houdini
Is Houdini free?
Houdini Apprentice is free for personal non-commercial projects. It includes virtually all features of Houdini FX, but renders are limited to 1920x1080 and watermarked on most formats, and files use a separate .hipnc format. Commercial work needs a paid license such as Houdini Indie at $299 for a one-year rental.
Can I use Houdini Apprentice for commercial work?
No. SideFX limits Apprentice to non-commercial projects, and it cannot be used in the same pipeline as commercial or Indie versions of Houdini.
Does Houdini Apprentice need the internet?
Yes, occasionally. The Apprentice license lasts 30 days and renews automatically, so Houdini needs an internet connection about once a month.
