For those who don’t know the tool: KeenTools makes tracking plugins for Nuke, Blender, and Adobe After Effects. The new GeoTracker for SideFX Houdini sits between matchmove and FX layout, and it runs as a SOP node in OBJ and Solaris.
Houdini gets geometry first tracking
GeoTracker for Houdini runs as a native SOP node inside Houdini and works in both OBJ and Solaris contexts. The tool targets geometry based object tracking and camera tracking from 2D footage, with the goal of keeping the full workflow in the Houdini scene rather than bouncing to a separate tracking app.
The core interaction stays intentionally direct. You align an imported or scene built 3D model to the filmed object, then use viewport pinning to keep that object stuck to the plate while the tool reconstructs motion across the shot. That tracked geometry can then feed downstream Houdini work where it actually matters, like driving FX timing, layout, and interactions.
If you already treat layout as the first FX department, this kind of geometry tracked handoff can save a lot of back and forth. It also means you can keep shot scale, scene units, and the rest of your Houdini context consistent, instead of trying to trcak down why a solve looks fine in one app and wrong in another.
Camera solves, lens guesses, and the boring parts
Alongside object motion, the Houdini beta supports camera tracking by aligning static objects or environment models, including LiDAR style environment meshes. It also includes focal length estimation for cases where camera parameters are unknown, plus zoom tracking to follow focal length changes over time.
The Houdini integration also calls out camera import and export in both OBJ and Solaris contexts. That matters because camera plumbing can become the silent time sink, especially when a show uses Solaris for USD centric lighting and layout but still relies on OBJ context for parts of the FX build.
GeoTracker remains geometry based, so you need a 3D model to start tracking. That model can be anything you import or create in the Houdini scene. More detail can help, but extremely dense meshes can get heavy. The beta also includes Surface Masks to exclude parts of the model from tracking when occlusions or reflections would otherwise pollute the solve.
Beta reality check, installs, and pricing
The plugin ships as an open beta and it is free during that beta period. Each beta version stays valid for 30 days, with regular updates planned until a stable release is ready.
Installation stays old school by design. You drop the extracted package into your Houdini packages directory on Windows, macOS, or Linux, and Houdini picks it up. Updates and removal work the same way: delete the old files, replace with new ones, or remove them entirely. There is no auto updater for the beta yet, so you own the housekeeping.
System requirements keep the target clear: Houdini 20.5 or newer on 64 bit Windows, macOS on Intel or Apple Silicon, or Linux. The guidance for graphics hardware stays refreshingly unromantic: a decent GPU that can handle Houdini.
As always, treat new tools like you treat new render builds: test in a controlled setup before you bet a delivery on it, even if the demo looks clean.
https://keentools.io
https://keentools.io/products/geotracker-for-houdini
