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Run summary · P1.D opacity decay (splat 数削減 + Metal kernel 効率化基盤)
lego-brushcompat-opacdecay-5k
P1.D opacity decay 5k — brushcompat-base-5k に opacity_decay_rate=0.004 を追加
partial pass
01
設定
- dataset
- /Users/otkrickey/dev/3dgs-workspace/datasets/nerf_synthetic/lego
- gt_convention
- Premultiplied
- iterations
- 5,000
- seed
- 42
- capacity
- 1,000,000 splats
- sh_degree
- 3
- loss
- L1Ssim
- lambda
- 0.200
- ssim
- window=7 sigma=1
- backend.backward
- Simd
- backend.loss_path
- Gpu
02
結果
Val PSNR
31.69dB
Wallclock
2m 34s
Final splats
83,093
Final loss
1.468421e-2
03
3D ビューワー
学習結果 PLY を .splat 形式に変換し、antimatter15/splat の WebGL ビューワーで対話表示。
04
推移
Loss curve — 反復ごとの training loss
Splat count — refine の発火と最終構成
05
中間ログ抜粋
| iter | 本 run loss |
|---|---|
| 1 | 5.9385e-1 |
| 500 | 8.6218e-2 |
| 1,000 | 5.4547e-2 |
| 1,500 | 3.1217e-2 |
| 2,000 | 1.9514e-2 |
| 2,500 | 1.7304e-2 |
| 3,000 | 1.6300e-2 |
| 3,500 | 1.5685e-2 |
| 4,000 | 1.5227e-2 |
| 4,500 | 1.4873e-2 |
| 5,000 | 1.4684e-2 |
06
関連 finding
この run を related_runs に含む finding (Positive / Negative どちらも)。
- positiveP1.D opacity decay rate sweep — rate=0.002 が PSNR 最高 sweet spot (brush default +0.40 dB)Δ PSNR +0.40 dB max (rate=0.002 vs default 0.004、ただし 5k smoke variance σ ±0.32 dB の 1.25 倍)Δ ~3 min/run、wallclock 影響微小2026-05-25
- positiveP1.D Stage 2 — Lego brushcompat + opacity decay 30k = 36.106 dB、splats -56% / wallclock -32%Δ PSNR +0.92 dB vs baseline 30k (35.184 → 36.106)Δ -32% vs baseline 30k (1h 02m 18s → 41m 54s)2026-05-25
- positiveP1.D opacity decay 5k smoke — splats -11.6%、PSNR +0.38 dB の同時改善Δ PSNR +0.38 dB vs Stage 1 baseline 5k (31.308 → 31.689)Δ +23% vs Stage 1 5k (2m 5s → 2m 34s、host RMW overhead、N で線形)2026-05-24