anamorphic 3d gaussian splatting

I tried to build that anamorphic effect: https://www.youtube.com/watch?v=UBK9JD3lEM4 with a 3d gaussian splatting scene for a 3d mapping project, but couldn’t get the system to work. I used the GaussianSplat_POPViewer. I couldn’t get a usable image. thanks for help