| --- |
| license: mit |
| tags: |
| - lora |
| - krea2 |
| - krea |
| - text-to-image |
| - comfyui |
| base_model: Krea/Krea-2 |
| --- |
| |
| # Kroma v0.1 — LoRA for Krea 2 |
|
|
| **Kroma** is a LoRA fine-tune for **Krea 2**, packaged as a single ComfyUI-compatible |
| `safetensors` file. It was rank reduced down to **rank 256 / alpha 256** and also carries the |
| fully-fine-tuned normalization and modulation tensors as weight deltas, so it |
| reproduces the original fine-tuned behaviour when loaded on top of the base model. |
|
|
| - **File:** `kroma-v0.1.safetensors` (~1.88 GB) |
| - **Type:** LoRA (264 adapters) + `.diff` weight deltas (159 RMSNorm / modulation tensors) |
| - **License:** MIT |
|
|
| > **Note on the format:** unlike a "pure" LoRA, this file also includes full-weight |
| > deltas for the trained RMSNorm scales and modulation tensors (stored as `.diff`). |
| > ComfyUI's `LoraLoader` applies these automatically, so no special handling is needed. |
|
|
| --- |
|
|
| ## Running in ComfyUI |
|
|
| ### 1. Requirements |
| - A recent **ComfyUI** with native **Krea 2** support (update to the latest master). |
| - The **Krea 2** diffusion model, text encoder, and VAE. |
|
|
| ### 2. Files to download |
| Place these in your ComfyUI folders: |
|
|
| | What | Where | Notes | |
| |------|-------|-------| |
| | `kroma-v0.1.safetensors` | `ComfyUI/models/loras/` | this repo | |
| | Krea 2 diffusion model | `ComfyUI/models/diffusion_models/` | base **or** Turbo (see below) | |
| | Krea 2 text encoder (Qwen3-VL) | `ComfyUI/models/text_encoders/` | load with CLIPLoader type `krea2` | |
| | Krea 2 VAE | `ComfyUI/models/vae/` | | |
|
|
| ### 3. Base model — Base vs Turbo |
| Kroma works on both Krea 2 checkpoints. **Turbo is recommended** (fewer steps, ~6× faster, |
| and in practice just as good or better with this LoRA): |
|
|
| | Checkpoint | Steps | Guidance (CFG) | Shift (mu) | |
| |------------|-------|----------------|------------| |
| | **Krea-2-Turbo** (recommended) | **8** | **0.0 – 1.0** | **1.15** | |
| | Krea-2 base | 28 | 3.5 – 4.5 | ~1.15 | |
|
|
| > The Turbo sampling values (`steps=8`, `cfg≈0`, `mu=1.15`) are the settings the Turbo |
| > checkpoint was distilled for; keep them for best results. |
|
|
| ### 4. Workflow |
| 1. **Load Diffusion Model** → your Krea 2 (base or Turbo) checkpoint. |
| 2. **Load CLIP** → the Krea 2 text encoder, set type to **`krea2`**. |
| 3. **Load VAE** → the Krea 2 VAE. |
| 4. **LoraLoader (Model only)** → select `kroma-v0.1.safetensors`, **strength_model = 1.0**. |
| Insert it between the diffusion model loader and the sampler. (The `.diff` norm / |
| modulation deltas are applied at the same strength; 1.0 reproduces the fine-tune exactly.) |
| 5. **KSampler** → set steps / CFG / shift per the table above. |
| 6. Prompt and generate. |
| |
| |
| ### 5. Tips |
| - Start with **strength 1.0**; lower it (e.g. 0.7–0.9) if you want a subtler effect. |
| - If the output looks off, confirm the text encoder is loaded with type **`krea2`** |
| (Krea 2 expects a 12-layer Qwen3-VL stack) and that you're on a current ComfyUI. |
| |
| --- |
| |
| ## Conversion / provenance |
| This LoRA was produced from a K2 (Krea 2) fine-tune checkpoint and converted into the |
| ComfyUI format: LoRA adapters use the native `diffusion_model.*` key naming, and the |
| fully-fine-tuned RMSNorm / modulation tensors are stored as `.diff` deltas against the |
| base model. Both are applied by ComfyUI's standard `LoraLoader`. |
| |
| ## License |
| **MIT** — see `LICENSE`. Note that the **base Krea 2 model** is governed by its own |
| license; this LoRA does not grant any rights to the base weights. |
|
|
