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fastsam3d-plus-plus 0.0.2

Exponential cache for Fast-SAM3D image-to-3D generation

Fast-SAM3D with a tree-aware HiCache++ cache that forecasts the slat-stage velocity with an exponential (DMD/Prony) basis. Training-free, geometry-preserving, and native — no monkey-patching.

# install (steps from benchmarks/fastsam3d-plus-plus.json)
git clone https://github.com/Archerkattri/fastsam3d-plus-plus.git
cd fastsam3d-plus-plus
pip install -r requirements.txt
pip install 'hicache-pp>=1.2.1'
01

Evidence

Lossless interval (DMD)F1 = 1.000 out to interval-6 on the slat-stage FlowMatching
Lossless interval (Hermite baseline)interval-3 — the exponential basis holds quality two intervals further
Speedup at interval-6best speedup among the lossless configs
CPU contract testssix tests pass (shared cache identity, timing, fallback accounting)
DMD fit floor≥4 uniform snapshots required, else Hermite warm-up fallback
Default cache configinterval=6, history=5 via fm.enable_dmd()
Central library pinhicache-pp>=1.2.1 PyTree implementation
02

Media

SS/SLaT/Mesh acceleration ablation table
SS / SLaT / Mesh acceleration ablation: CD, F1, vIoU and scene time per config.
Per-stage latency breakdown chart
Per-stage latency breakdown (SS / SLaT / Mesh / Others): baseline vs cached run.
03

Install & verify

# CPU contract tests (release notes: CI green)
python -m pytest tests/ -q
# expect: 6 passed (README: "Six CPU contract tests pass")
# GPU A/B (needs weights + FASTSAM3D_METRICS_PATH; not verified this release)
python ab_accel_bench.py --tag hf --mask-index 14 --gpu 0
04

Limits

What this release does not claim (from the release notes):

  • GPU speedup validation and weight-gated demo cells.
05

Family

Base modelFast-SAM3D, accelerated by the hicache-plus-plus forecast core
Same basesam3d-plus · sam3d-plus-plus · fastsam3d-plus
All 13 adaptersTRELLIS: faster-trellis, faster-trellis-plus-plus · TRELLIS.2: fast-trellis2, hermit-trellis2, hermit-trellis2-plus-plus · Hunyuan3D-2: hunyuan2-plus, hunyuan2-plus-plus · Hunyuan3D-2.1: hunyuan2.1-plus, hunyuan2.1-plus-plus · SAM: sam3d-plus, sam3d-plus-plus, fastsam3d-plus, fastsam3d-plus-plus
ExternalPaper arXiv:2602.05293 · SAM 3D arXiv:2511.16624