{
 "id": "e005_lora_neutral_control",
 "title": "Control LoRA: the model's own neutral images, neutral captions",
 "date": "2026-10-03",
 "kind": "lora",
 "status": "done",
 "spec": {
  "id": "e005_lora_neutral_control",
  "title": "Control LoRA: the model's own neutral images, neutral captions",
  "flavor": "neutral",
  "seed_base": 1000,
  "lr": 0.0001,
  "direction": 0,
  "changed": "the training images are the stock model's neutral renders",
  "question": "Does fine-tuning on the model's own images move the mood by itself? (A control that can fail.)",
  "date": "2026-10-03"
 },
 "recipe": {
  "base model": "Sana 600M 512px (stock, Apache-2.0)",
  "adapter": "LoRA rank 32 (alpha = rank) on every linear layer of the 28 transformer blocks",
  "optimizer": "Adam, no weight decay, learning rate 0.0001, 20 linear warmup steps, then constant",
  "batch": "4 images per step",
  "length": "10 epochs x 48 steps = 480 steps",
  "saves": "every 2 epochs, each with previews of 4 held-out prompts",
  "resolution": "512 x 512",
  "timestep shift": "3.0 (the checkpoint's own)",
  "precision": "bf16 (the LoRA is saved in bf16)",
  "evaluation": "8 held-out scenes x seeds 101, 202, 303, 404, 20 steps, guidance 4.5"
 },
 "epochs": [
  {
   "epoch": 2,
   "scale": 1.0,
   "mean": 0.3306457232683897,
   "se": 0.12893882014295094,
   "frac_pos": 0.8125,
   "n": 32,
   "OUTCOME": "CONTROL",
   "content_kept": 0.9721308220177889,
   "mood_score": 1.0970723628997803,
   "pixels": {
    "luma": 0.47827833238989115,
    "sat": 0.4129191283136606,
    "warmth": 0.07002029614523053,
    "contrast": 0.30231243651360273
   }
  },
  {
   "epoch": 4,
   "scale": 1.0,
   "mean": 0.39772655814886093,
   "se": 0.12554822719425363,
   "frac_pos": 0.8125,
   "n": 32,
   "OUTCOME": "CONTROL",
   "content_kept": 0.9713291935622692,
   "mood_score": 1.1641532182693481,
   "pixels": {
    "luma": 0.5139990951865911,
    "sat": 0.39739791490137577,
    "warmth": 0.07716651912778616,
    "contrast": 0.30508847814053297
   }
  },
  {
   "epoch": 6,
   "scale": 1.0,
   "mean": 0.43084683269262314,
   "se": 0.10241579250589981,
   "frac_pos": 0.8125,
   "n": 32,
   "OUTCOME": "CONTROL",
   "content_kept": 0.9698804393410683,
   "mood_score": 1.1972734928131104,
   "pixels": {
    "luma": 0.5110723646357656,
    "sat": 0.40154851227998734,
    "warmth": 0.07681594509631395,
    "contrast": 0.306139855645597
   }
  },
  {
   "epoch": 8,
   "scale": 1.0,
   "mean": 0.3534310292452574,
   "se": 0.09737796709325917,
   "frac_pos": 0.65625,
   "n": 32,
   "OUTCOME": "CONTROL",
   "content_kept": 0.968297814950347,
   "mood_score": 1.119857668876648,
   "pixels": {
    "luma": 0.508654854260385,
    "sat": 0.39800949580967426,
    "warmth": 0.07533816434442997,
    "contrast": 0.3027775869704783
   }
  },
  {
   "epoch": 10,
   "scale": 0.5,
   "mean": 0.22760832123458385,
   "se": 0.09838567401052334,
   "frac_pos": 0.625,
   "n": 32,
   "OUTCOME": "CONTROL",
   "content_kept": 0.9789615999907255,
   "mood_score": 0.9940349459648132,
   "pixels": {
    "luma": 0.4826270332559943,
    "sat": 0.3920339746400714,
    "warmth": 0.0700287283398211,
    "contrast": 0.2903351611457765
   }
  },
  {
   "epoch": 10,
   "scale": 1.0,
   "mean": 0.30393643490970135,
   "se": 0.0890526511161117,
   "frac_pos": 0.71875,
   "n": 32,
   "OUTCOME": "CONTROL",
   "content_kept": 0.9691903609782457,
   "mood_score": 1.0703630447387695,
   "pixels": {
    "luma": 0.4851257065311074,
    "sat": 0.41412709187716246,
    "warmth": 0.07607955252751708,
    "contrast": 0.30458328127861023
   }
  }
 ],
 "final": {
  "epoch": 10,
  "scale": 1.0,
  "mean": 0.30393643490970135,
  "se": 0.0890526511161117,
  "frac_pos": 0.71875,
  "n": 32,
  "OUTCOME": "CONTROL",
  "content_kept": 0.9691903609782457,
  "mood_score": 1.0703630447387695,
  "pixels": {
   "luma": 0.4851257065311074,
   "sat": 0.41412709187716246,
   "warmth": 0.07607955252751708,
   "contrast": 0.30458328127861023
  }
 },
 "final_diffs": [
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 ],
 "first_epoch_beyond_3se": 4,
 "train_seconds": 120,
 "summary": "control: mood effect +0.30 +- 0.09 at scale 1; CONTROL QUIET against e004",
 "finished_utc": "2026-10-03 23:38"
}