PSNR 44.7 dB / SSIM 0.991 on held-out views. Synthetic Gaussian splat of a looping tornado VDB, rendered in Houdini Karma XPU under an azimuth-averaged Gdansk HDRI: 1200 views at 1024 px, 128 spp, OIDN. Trained in LichtFeld Studio (MRNF, 414k splats, SH0) on lossless frames over an 8 px block-noise background.