Training epochs: 24
Training steps: 15000
Learning rate: 3e-06
- Learning rate schedule: polynomial
- Warmup steps: 500
Max grad value: 2.0
Effective batch size: 4
- Micro-batch size: 2
- Gradient accumulation steps: 2
- Number of GPUs: 1
Gradient checkpointing: True
Prediction type: flow_matching[]
Optimizer: optimi-lion (config=weight_decay=1e-3)
Trainable parameter precision: Pure BF16
Base model precision: no_change
Caption dropout probability: 0.1%

LyCORIS Config:

json

{
    "bypass_mode": true,
    "algo": "lokr",
    "multiplier": 1.0,
    "linear_dim": 10000,
    "linear_alpha": 1,
    "factor": 16,
    "full_matrix": true,
    "apply_preset": {
        "target_module": [
            "Flux2Attention",
            "Flux2FeedForward",
            "Flux2ParallelSelfAttention"
        ],
        "module_algo_map": {
            "Flux2Attention": {
                "factor": 16
            },
            "Flux2FeedForward": {
                "factor": 16
            },
            "Flux2ParallelSelfAttention": {
                "factor": 16
            }
        }
    }
}

Datasets

BESCH-CROP-FLUX2-V02-512

Repeats: 3
Total number of images: 96
Total number of aspect buckets: 6
Resolution: 0.262144 megapixels
Cropped: True
Crop style: random
Crop aspect: closest
Used for regularisation data: No

BESCH-CROP-FLUX2-V02-768

Repeats: 3
Total number of images: 95
Total number of aspect buckets: 6
Resolution: 0.589824 megapixels
Cropped: True
Crop style: random
Crop aspect: closest
Used for regularisation data: No

BESCH-CROP-FLUX2-V02-1024

Repeats: 3
Total number of images: 16
Total number of aspect buckets: 4
Resolution: 1.048576 megapixels
Cropped: True
Crop style: random
Crop aspect: closest
Used for regularisation data: No

BESCH-SKETCH-FLUX2-V02-512

Repeats: 3
Total number of images: 68
Total number of aspect buckets: 18
Resolution: 0.262144 megapixels
Cropped: True
Crop style: random
Crop aspect: closest
Used for regularisation data: No

BESCH-SKETCH-FLUX2-V02-768

Repeats: 3
Total number of images: 42
Total number of aspect buckets: 17
Resolution: 0.589824 megapixels
Cropped: True
Crop style: random
Crop aspect: closest
Used for regularisation data: No

BESCH-SKETCH-FLUX2-V02-1024

Repeats: 3
Total number of images: 15
Total number of aspect buckets: 14
Resolution: 1.048576 megapixels
Cropped: True
Crop style: random
Crop aspect: closest
Used for regularisation data: No

BESCH-FINISHED-MEDIA-FLUX2-V02-512

Repeats: 3
Total number of images: 83
Total number of aspect buckets: 15
Resolution: 0.262144 megapixels
Cropped: True
Crop style: random
Crop aspect: closest
Used for regularisation data: No

BESCH-FINISHED-MEDIA-FLUX2-V02-768

Repeats: 3
Total number of images: 77
Total number of aspect buckets: 15
Resolution: 0.589824 megapixels
Cropped: True
Crop style: random
Crop aspect: closest
Used for regularisation data: No

BESCH-FINISHED-MEDIA-FLUX2-V02-1024

Repeats: 3
Total number of images: 54
Total number of aspect buckets: 11
Resolution: 1.048576 megapixels
Cropped: True
Crop style: random
Crop aspect: closest
Used for regularisation data: No

Inference

python

import torch
from diffusers import DiffusionPipeline
from lycoris import create_lycoris_from_weights


def download_adapter(repo_id: str):
    import os
    from huggingface_hub import hf_hub_download
    adapter_filename = "pytorch_lora_weights.safetensors"
    cache_dir = os.environ.get('HF_PATH', os.path.expanduser('~/.cache/huggingface/hub/models'))
    cleaned_adapter_path = repo_id.replace("/", "_").replace("\\", "_").replace(":", "_")
    path_to_adapter = os.path.join(cache_dir, cleaned_adapter_path)
    path_to_adapter_file = os.path.join(path_to_adapter, adapter_filename)
    os.makedirs(path_to_adapter, exist_ok=True)
    hf_hub_download(
        repo_id=repo_id, filename=adapter_filename, local_dir=path_to_adapter
    )

    return path_to_adapter_file
    
model_id = 'black-forest-labs/FLUX.2-klein-base-9B'
adapter_repo_id = 'gattaplayer/besch-flux2-klein-9b-lokr-lion-3e-6-bs2-ga2-v02'
adapter_filename = 'pytorch_lora_weights.safetensors'
adapter_file_path = download_adapter(repo_id=adapter_repo_id)
pipeline = DiffusionPipeline.from_pretrained(model_id, torch_dtype=torch.bfloat16) # loading directly in bf16
lora_scale = 1.0
wrapper, _ = create_lycoris_from_weights(lora_scale, adapter_file_path, pipeline.transformer)
wrapper.merge_to()

prompt = "An astronaut is riding a horse through the jungles of Thailand."
negative_prompt = ''

## Optional: quantise the model to save on vram.
## Note: The model was not quantised during training, so it is not necessary to quantise it during inference time.
#from optimum.quanto import quantize, freeze, qint8
#quantize(pipeline.transformer, weights=qint8)
#freeze(pipeline.transformer)
    
pipeline.to('cuda' if torch.cuda.is_available() else 'mps' if torch.backends.mps.is_available() else 'cpu') # the pipeline is already in its target precision level
model_output = pipeline(
    prompt=prompt,
    negative_prompt=negative_prompt,
    num_inference_steps=20,
    generator=torch.Generator(device='cuda' if torch.cuda.is_available() else 'mps' if torch.backends.mps.is_available() else 'cpu').manual_seed(42),
    width=1024,
    height=1024,
    guidance_scale=None,
).images[0]

model_output.save("output.png", format="PNG")