{
  "schema": "studycommons.hero.provenance.v2",
  "asset_role": "Study Commons public Daily Read hero",
  "slug": "what-is-the-canadian-shield-rock-lakes-mines",
  "generation_id": "img-ff56db9b9657b3c3a3089de4",
  "generator": "QwenImage21Pipeline",
  "model": "Qwen/Qwen-Image-2.1-Turbo",
  "model_revision": "fc13ba1986fcb905854dc8de2f52eee395f49b5b",
  "model_license": "Qwen Research License, non-commercial research/evaluation only; commercial use requires separate permission",
  "model_index_sha256": "97e2febeb19d93cb41fa44807cde8bd42757950b5dffeacdb0331fb2d390cf20",
  "checkpoint_sha256": "37230cd77d377c0be0acc06d628fd8a6e978e23eb2c530b73fa98df54ef62557",
  "renderer_source_sha256": "9668ef4c512a6a71ad2a84ae250b936f143c43d321d1e5dd93967307d41edea2",
  "prompt": "Wide full-frame atmospheric landscape photograph style: Canadian Shield in northern Ontario, ancient smooth pink and grey granite outcrops in foreground, sparse spruce and pine trees rooted in narrow rock crevices, countless small blue lakes among gently rolling rocky boreal forest under a soft autumn sky. Physically believable exposed Precambrian bedrock rounded by glacial erosion, thin soil, no mountains, no isolated diorama, no white border, no people, no industrial mine, no fictional map. Immersive real-world landscape perspective with rocky shoreline extending to image edges. Beautiful wide 16:9 photorealistic editorial illustration for an educational article for children ages 8–11. Single coherent scene, accurate real-world objects and anatomy, natural light, full-bleed image. No writing, labels, numbers, text, logos, watermarks, collages, arrows or decorative graphics.",
  "prompt_sha256": "577d0d96697ee019447f264f5df40b9ab05ed077a62a5c60fcd8aff1e13276a0",
  "negative_prompt": "",
  "seed": 2026110203,
  "width": 1312,
  "height": 736,
  "num_inference_steps": 8,
  "true_cfg_scale": 1.0,
  "scheduler": "FlowMatchEulerDiscreteScheduler",
  "sampling": "explicit-checkpoint-8-sigma",
  "sample_sigmas": [
    1.0,
    0.978453,
    0.95418,
    0.926626,
    0.89508,
    0.845148,
    0.704534,
    0.414568
  ],
  "generator_device": "cpu",
  "generator_algorithm": "torch.Generator('cpu').manual_seed(seed)",
  "torch_dtype": "bfloat16",
  "cpu_offload": "model",
  "use_kv_cache": true,
  "vae_tiling": true,
  "lora": null,
  "reference_images": [],
  "gpu": "NVIDIA CUDA (hardware-specific machine details withheld)",
  "runtime": {
    "torch": "2.13.0+cu130",
    "diffusers": "0.41.0",
    "transformers": "5.17.0",
    "cuda": "13.0"
  },
  "job_completed_at": "2026-11-02T13:14:26.391142+00:00",
  "output_png_sha256": "ff56db9b9657b3c3a3089de42a543a63991d7c1a3925eace4302eddb51715e42",
  "output_png_dimensions": [
    1312,
    736
  ],
  "postprocess": {
    "format": "AVIF",
    "ffmpeg_version": "ffmpeg version 6.1.1-3ubuntu5 Copyright (c) 2000-2023 the FFmpeg developers",
    "filter": "scale=1280:720:force_original_aspect_ratio=increase:flags=lanczos,crop=1280:720",
    "encoder": "libaom-av1",
    "still_picture": 1,
    "crf": 16,
    "bitrate": "0",
    "cpu_used": 6,
    "pix_fmt": "yuv420p",
    "frames": 1,
    "source_png_sha256": "ff56db9b9657b3c3a3089de42a543a63991d7c1a3925eace4302eddb51715e42",
    "output_avif_sha256": "72616f8710a60b6849cf81af16282b77e116ccc10988a6d3ee14b3566807213a",
    "output_avif_width": 1280,
    "output_avif_height": 720,
    "output_avif_bytes": 185133
  },
  "reproduce": {
    "recipe": "QwenImage21Pipeline.from_pretrained(model_path, dtype=torch.bfloat16); enable_model_cpu_offload(); vae.enable_tiling(); pipeline(prompt=prompt, width=width, height=height, true_cfg_scale=1.0, num_inference_steps=8, sigmas=sample_sigmas, use_kv_cache=True, generator=torch.Generator('cpu').manual_seed(seed)); encode PNG to AVIF using postprocess fields",
    "model_source": "Hugging Face model ID and exact model_revision above, subject to the stated license",
    "verification": "Compare generated PNG and AVIF against SHA-256 fields. Accelerator and software differences may prevent bit-for-bit equality."
  },
  "provenance_note": "Generation parameters and cryptographic integrity chain, not proof of legal ownership or absence of third-party rights. Private machine paths are excluded."
}