The repository provides implementations of 3D Gaussian Ray Tracing (3DGRT) and 3D Gaussian Unscented Transform (3DGUT), techniques for rendering volumetric Gaussian particles. 3DGRT performs ray tracing enabling support for distorted cameras and secondary rays for reflection/refraction, while 3DGUT achieves similar effects within a rasterization framework. The hybrid 3DGRUT approach combines primary ray rasterization with secondary ray tracing.