What this stresses: The classic generative failure. Full-frame hands at 0.5 MP with fine bimanual coordination, plus synchronised micro-foley.
960×544 · 124f (5.17 s) · 24 fps · seed 424242 · identical prompt in every cell. Same seed does not mean same take — steps, sampler and LoRA all change the trajectory, so judge character rather than shot-for-shot identity.
integrated_multimodal_description: [Shot 1] A photorealistic overhead extreme close-up of a pair of weathered adult hands tying a fishing fly in a small steel vise, filling the frame against a dark green cutting mat, hard focused task lighting from the upper left, both hands fully visible with all ten fingers in frame. From 0.0 to 1.5 seconds the left thumb and forefinger pinch a wisp of red thread taut while the right hand makes three tight wraps around the hook shank. At the 1.8-second mark the right hand picks up fine-tipped scissors and makes a single clean snip at 2.3 seconds. From 2.6 to 4.0 seconds both hands work together whip-finishing the head of the fly, fingers crossing over one another. At 4.4 seconds the right index finger taps the finished fly once and it swings on the hook. No face, arms or body is ever visible; the hands never leave frame and never blur into one another. overall_soundscape: A quiet workroom, close-mic'd and intimate. Thread drawn taut with a fine squeak at 0.7 seconds. A single sharp metallic scissor snip at 2.3 seconds. Soft finger friction and thread whisper from 2.6 to 4.0 seconds. A tiny hook tap and a metallic ring at 4.4 seconds. A very low room tone underneath, no music, no voice. non_diegetic_music: N/A
| config | time | floor | median | peak | jitter | detail | raw detail | luma |
|---|---|---|---|---|---|---|---|---|
| baseline · 20 steps | 166s | -55.1 | -52.1 | -2.1 | 224.7 | 0.036 | 106 | 96.0 |
| ema-ckpt500 · 8 steps | 77s | -58.3 | -54.1 | 0.9 | 289.5 | 0.027 | 90 | 93.7 |
| ckpt500 (non-EMA) · 8 steps | 77s | -53.0 | -45.4 | 3.0 | 253.4 | 0.051 | 149 | 86.9 |
| lightx2v · 4 steps · str 1.0 | 45s | -63.1 | -56.5 | 2.7 | 302.4 | 0.049 | 141 | 98.1 |
| lightx2v · 4 steps · str 1.0 · shift 12/6 | 45s | -73.9 | -63.1 | 1.0 | 298.2 | 0.048 | 139 | 98.4 |
| lightx2v · 4 steps · str 1.0 · er_sde | 45s | -63.6 | -59.6 | 2.3 | 287.1 | 0.042 | 108 | 96.3 |
| lightx2v · 4 steps · str 0.75 | 45s | -62.8 | -56.2 | 3.1 | 301.5 | 0.050 | 133 | 96.0 |
| lightx2v · 4 steps · str 0.75 · shift 12/6 | 45s | -75.5 | -60.9 | 3.0 | 295.3 | 0.048 | 130 | 95.8 |
| lightx2v · 4 steps · str 0.75 · er_sde | 45s | -64.8 | -60.1 | 2.0 | 250.5 | 0.034 | 96 | 96.0 |
| lightx2v · 8 steps · str 1.0 | 77s | -59.3 | -52.4 | 1.3 | 319.1 | 0.045 | 118 | 94.5 |
| lightx2v · 8 steps · str 1.0 · shift 12/6 | 76s | -66.4 | -55.8 | 2.2 | 316.6 | 0.045 | 117 | 95.1 |
| lightx2v · 8 steps · str 0.75 · er_sde | 77s | -60.1 | -57.0 | 2.2 | 287.5 | 0.037 | 102 | 100.8 |
| baseline · 20 steps + Spectrum | 107s | -54.1 | -50.9 | -3.6 | 288.1 | 0.027 | 74 | 89.6 |
| ema-ckpt500 · 8 steps + Spectrum | 61s | -53.7 | -51.9 | -4.1 | 289.6 | 0.030 | 89 | 91.7 |
| ema-ckpt500 · 8 steps + SageAttention | 50s | -62.0 | -56.5 | -2.1 | 307.8 | 0.032 | 106 | 93.2 |
| ema-ckpt500 · 8 steps + Sage + Spectrum | 41s | -56.6 | -54.4 | -0.0 | 283.2 | 0.026 | 74 | 90.8 |
| baseline · 20 steps + SageAttention | 98s | -55.0 | -52.1 | -4.7 | 231.4 | 0.034 | 95 | 95.2 |
| baseline · 20 steps + Sol-Attn | 98s | -51.3 | -48.7 | 0.3 | 299.7 | 0.026 | 68 | 90.6 |
| ema-ckpt850 · 8 steps | 77s | -56.0 | -49.9 | -0.6 | 297.8 | 0.039 | 122 | 88.9 |
| v4-step600 EMA · 8 steps | 78s | -52.3 | -49.0 | 1.9 | 253.6 | 0.030 | 93 | 91.7 |
| v4-step600 non-EMA · 8 steps | 77s | -50.2 | -46.9 | -1.2 | 260.5 | 0.035 | 96 | 85.8 |
| v4-step600 EMA · 8 steps · euler + beta | 77s | -55.5 | -51.4 | -0.1 | 283.7 | 0.035 | 95 | 90.0 |
| v4-step600 EMA · 4 steps | 45s | -54.6 | -52.9 | -1.5 | 338.5 | 0.126 | 386 | 110.6 |
| v4-step600 EMA · 8 steps + SageAttention | 50s | -51.7 | -48.8 | 2.0 | 266.8 | 0.035 | 102 | 90.0 |
| ema-ckpt500 · 8 steps · euler + beta | 77s | -59.5 | -57.3 | -5.2 | 260.8 | 0.026 | 71 | 94.1 |
344b4398 (2026-08-07, "Support asym w4a8_int (#15308)") · torch 2.12.1+cu130 · NVIDIA GeForce RTX 5080, 15.4 GB1a06e20 (v0.1.9) — used by the two Spectrum columns only · comfyui-kjnodes 1.4.9 · ComfyUI-sol-attn 251c27f