This scene is former Sandford Fleming Atrium (commonly known as "The Pit") at the University of Toronto. It was captured in January 2025, months before its renovation, with a Samsung S21 smartphone camera (~6400 frames, 1440x1080).
Trained with Spirula Studio (https://github.com/harry7557558/spirula-studio, commit aca1e3e2d60eae3c8ba867039f334c91f7e4095b; formerly spirulae-splat).
Training command: `PYTORCH_CUDA_ALLOC_CONF=expandable_segments:True ns-train spirulae-preset-confined --data data/Atrium_Godiva/ --pipeline.datamanager.cache_images disk --pipeline.model.optimizer_offload all --pipeline.datamanager.split_batch True --pipeline.model.mcmc-cap-max 8000000 --pipeline.model.sh_degree 2 --pipeline.model.depth_supervision_weight 0.01 --max-num-iterations 80000 --pipeline.model.stop-refine-at 75000 nerfstudio-data --load_thumbnails False`.
Depth and normal predicted by Metric3D v2 was used to supervise training. Entire training took around 23 hours on a laptop with RTX 5070 (8GB VRAM).
Special thanks @launchedpix for alignment in Metashape. Dataset download link can be found in MrNeRF & Brush Discord group.