This supplementary material is for paper "R$^2$-Gaussian: Rectifying Radiative Gaussian Splatting for Tomographic Reconstruction." It includes the code "r2_gaussian.zip" and a video demo "convergence_demo.mov".

The code comes with a README.md file for usage instructions. It is properly licensed.

The video demo visualizes the convergence of different methods.

Additional text supplementary material is attached in the main PDF file.