TACTYC Studio has released Onesplat, a Houdini SOP that generates a 3D gaussian splat from a single image on a local GPU. Dropping an Onesplat Generate SOP into a network, pointing it at an image and pressing generate returns a splat baked through Houdini's native Bake GSplat SOP into GS_Alpha, orient, scale and Cd attributes. Background removal is automatic, so a photograph, render or piece of concept art needs no masking pass.
On an RTX 4090 at 20 steps from a single reference photo, Onesplat produces 65,536 gaussians in 11.1 seconds and 262,144 gaussians in 11.5 seconds. Peak VRAM is 4.6 GB, and the model loads in about 11 seconds once per Houdini session. Gaussian count is close to free across that range, because the cost sits in the denoiser and not in the density, leaving viewport performance as the reason to run below maximum quality.
The Bake GSplat SOP that Onesplat writes into arrived in Houdini 21.0, and SideFX shipped the native Gaussian Splat pipeline in a stable build with Houdini 22. Houdini 20.5 and older will not run the plugin, and the installer says so. Onesplat requires an NVIDIA GPU with 6 GB of VRAM or more, 64 bit Windows 10 or 11, Python 3.10 to 3.12, and about 10 GB of free disk, with no AMD, Intel or Apple Silicon support.
Rendering works in Karma XPU. Storm and Karma CPU show splats as a colored point cloud, which TACTYC attributes to how Houdini's Gaussian Splat support works today and not to the plugin.
Onesplat ships no model weights. First setup fetches an open source model and PyTorch, roughly 10 GB once, after which the plugin runs offline and nothing generated leaves the machine. What TACTYC does not state in the listing is which open source model that is. As a reminder, Apple's SHARP does not carry a commercially viable license.
The node doubles as a splat loader, reading any standard 3DGS PLY file, with full spherical harmonics support. ComfyUI v0.23.0 added a TripoSplat template that turns one uploaded image into a gaussian splat, and TripoSplat, Apple's SHARP and Microsoft's TRELLIS have been compared on object level output and licensing.
Updates within 1.x are free, and no refunds are offered. Onesplat is available on Gumroad.
