StochasticSplats

Welcome to the StochasticSplats project repository!

StochasticSplats: Stochastic Rasterization for Sorting-Free 3D Gaussian Splatting

Accepted to ICCV 2025

Shakiba Kheradmand^1,2,*, Delio Vicini^3,*, George Kopanas^3,4,†, Dmitry Lagun¹, Kwang Moo Yi², Mark Matthews¹, Andrea Tagliasacchi^1,5,6

¹Google DeepMind, ²University of British Columbia, ³Google, ⁴Runway ML, ⁵Simon Fraser University, ⁶University of Toronto

Overview

This repository builds upon and extends the capabilities of Splatapult, a 3D Gaussian splats viewer written by Anthony J. Thibault. StochasticSplats introduces stochastic rasterization methods enabling sorting-free 3D Gaussian splatting. You can run the app on desktop or in VR mode.

For a detailed explanation of controls and features, please refer to the original README.

🤝 Contributing

Found a bug or have an idea to improve this project?
I’d love your input! Please open a pull request.
Thank you for helping make this project better.

🚀 How to Run

To run StochasticSplats, follow these steps:

1. Prepare Your Scene

Ensure your scene is in the standard 3D Gaussian Splatting format, which consists of a directory containing:

• cameras.json
• input.ply
• A pointcloud/ subdirectory with the point cloud data.

2. Run the Viewer

Execute the viewer from your build directory, providing the path to your scene.

Command Syntax:

splatapult.exe [options] [path/to/scene] [options]
./build/splatapult [path/to/scene] [options]

Example on Desktop:

splatapult.exe path/to/my/scene --render_mode [AB | ST | ST-popfree] --width 1920 --height 1080

Example on VR:

splatapult.exe -v path/to/my/scene --render_mode [AB | ST | ST-popfree] --width 1692 --height 1824

Command-Line Options

The following table details the command-line arguments added in this code base. For the complete options, please refere to original README.

Option	Description	Default
--width	Sets the width of the application window.	1296
--height	Sets the height of the application window.	840
--render_mode	Specifies the rendering mode. AB: Alpha Blending ST: Stochastic Rendering (for original 3DGS scenes) ST-popfree: Pop-free Stochastic Rendering (for scenes trained/finetuned using our method)	AB
--samples	Defines the number of samples for stochastic modes. The maximum value depends on your hardware.	1
--no-taa	Disables Temporal Anti-Aliasing (TAA). By default, TAA is enabled but automatically turns off when samples > 1.	false

Citation

If you utilize StochasticSplats in your research, please cite our ICCV 2025 paper:

@inproceedings{kv2025stochasticsplats,
  title={StochasticSplats: Stochastic Rasterization for Sorting-Free 3D Gaussian Splatting},
  author={Kheradmand, Shakiba and Vicini, Delio and Kopanas, George and Lagun, Dmitry and Yi, Kwang Moo and Matthews, Mark and Tagliasacchi, Andrea},
  booktitle={Proceedings of the IEEE/CVF International Conference on Computer Vision (ICCV)},
  year={2025}
}