DHM · s009 canary · LUT bake-off · 2026-08-06

Two packs applied via ffmpeg lut3d to the v1+lift scale-1.6 output: purple11 (12 cubes, ~/DHM/LUTS on sandstorm) and highway (15 cubes, NAS: Voltage Labs/clients/DHM/real-estate-luts-fcpx-apple-motion….zip). Sorted best→worst by mean |ΔL| at p25/p50/p75 vs beat (beat: 45.9 / 69.9 / 75.7). Baseline RAW sits mid-pack; only smooth-sailing, hw-11, urban-cowboy, hw-06 beat it. Two fitted cards = percentile curves calibrated on the other 24 holdout scenes (s009 unseen). Score is tonality-only — check color casts by eye.

fitted-RGB (24-scene calibrated curve, s009 held out)
avg|dL| 3.59
fitted-Y (luminance-only variant)
avg|dL| 3.64
input
beat (editor target)
smooth-sailing
purple11 · avg|dL| 4.62
hw-11
highway · avg|dL| 6.78
urban-cowboy
purple11 · avg|dL| 7.02
hw-06
highway · avg|dL| 7.93
v1+lift s1.6 RAW (baseline)
avg|dL| 8.39
hw-07
highway · avg|dL| 8.99
passing-by
purple11 · avg|dL| 9.87
well-see
purple11 · avg|dL| 9.87
serenity
purple11 · avg|dL| 11.39
hw-10
highway · avg|dL| 11.79
hw-05
highway · avg|dL| 12.10
hw-09
highway · avg|dL| 12.14
hw-14
highway · avg|dL| 12.54
you-can-do-it
purple11 · avg|dL| 12.91
once-upon-a-time
purple11 · avg|dL| 12.93
hw-12
highway · avg|dL| 13.07
good-morning
purple11 · avg|dL| 13.33
nah
purple11 · avg|dL| 13.36
hw-15
highway · avg|dL| 13.94
hw-02
highway · avg|dL| 14.11
hw-03
highway · avg|dL| 15.24
hw-08
highway · avg|dL| 15.44
hw-04
highway · avg|dL| 15.68
going-for-a-walk
purple11 · avg|dL| 17.67
hw-13
highway · avg|dL| 18.13
hw-01
highway · avg|dL| 18.26
undeniable-2
purple11 · avg|dL| 20.23
undeniable
purple11 · avg|dL| 20.24

Stage 0 fresh bases · s009 (2026-08-06)

RAW→base prototypes, develop→align→enfuse from the 6 brackets. A = plain (non-guide reproduction). B = tuned: exposure-optimum 0.42 + VM-bbox window composite from darkest bracket + neutral WB. B has 0.00% clipped pixels and real exterior detail in every window.

base A · plain enfuse
base B · tuned (VM window composite + WB)
old non-guide input (what v1 LoRA saw)
base B → fal (v1+lift s1.6, seed 42)
base B → fal → fitted LUT (full new track)

Hi-res test · s009 @ 2560×1728 (2026-08-07)

FLUX.2 accepted 2560×1728 natively (19s). Edge damage vs base nearly halved (0.020 vs 0.036) but tone drifted (+1L vs 1536 track). LUT needs a hi-res refit before adopting.

base @ 2560
fal @ 2560 (v1+lift 1.6)
final @ 2560 (b2 LUT, unrefit)

3:2 follow-up: fal snaps dims to /64 (2592→2560). Largest exact-3:2: 2496×1664 (4.15MP) — honored exactly, 19s. Cards:

base @ 2496×1664
fal @ 2496 (3:2)
final @ 2496 (b2 LUT, unrefit)