| --- |
| license: mit |
| base_model: black-forest-labs/FLUX.2-klein-9B |
| tags: |
| - lora |
| - flux |
| - flux.2 |
| - flux.2-klein-9b |
| - image-to-image |
| - text-to-image |
| - font |
| - typography |
| - atlas |
| - comfyui |
| - safetensors |
| --- |
| |
| # Ref2Font V3 — Contextual LoRA for FLUX.2 Klein 9B |
|
|
| **Ref2Font V3** is an updated **contextual LoRA** trained for **black-forest-labs/FLUX.2-klein-9B**. It generates **1280×1280 font atlases** from a single reference image (**"Aa"** for Latin or **"Аа"** for Cyrillic scripts). |
|
|
| ### Changes in V3: |
| - **Cyrillic Support:** Now generates Russian fonts using "Аа" as reference. |
| - **Extended Glyphs:** Added `"` and `&`. |
| - **Straighter Letters:** Improved alignment and reduced "jitter" in atlas generation. |
|
|
| **Changes in V2:** |
| - Fixed alignment issues (letters no longer "dance" or jump). |
| - Increased resolution to **1280x1280**. |
| - Improved vectorization scripts. |
|
|
| > Disclaimer: it works **well**, but **not perfectly**. Expect occasional artifacts. |
|
|
| ## Examples |
|
|
|  |
|
|
|  |
|
|
|  |
|
|
| ## Guide |
| The full usage, installation guide and detailed workflow live in the [GitHub repo](https://github.com/SnJake/Ref2Font): |
| ``` |
| https://github.com/SnJake/Ref2Font |
| ``` |
|
|
| ## What’s included |
| - `Ref2FontV3.safetensors` (LoRA weights) |
| - `Example Workflow/` (ComfyUI workflow with notes inside nodes) |
| - `Example/` (input images and their atlases) |
| - Post-processing scripts (`flux_pipeline.py`, `flux_grid_to_ttf.py`, `flux_upscale.py`) |
|
|
| ## License |
| MIT |
|
|
| ## ComfyUI setup |
| ### Required models |
| 1) Base model: |
| ``` |
| https://huggingface.co/black-forest-labs/FLUX.2-klein-base-9B/blob/main/flux-2-klein-base-9b.safetensors |
| ``` |
| Place in: `ComfyUI/models/diffusion_models` |
|
|
| 2) Text encoder (Qwen): |
| ``` |
| https://huggingface.co/Comfy-Org/vae-text-encorder-for-flux-klein-9b/blob/main/split_files/text_encoders/qwen_3_8b.safetensors |
| ``` |
| Place in: `ComfyUI/models/text_encoders` |
|
|
| 3) VAE: |
| ``` |
| https://huggingface.co/Comfy-Org/vae-text-encorder-for-flux-klein-9b/blob/main/split_files/vae/flux2-vae.safetensors |
| ``` |
| Place in: `ComfyUI/models/vae` |
|
|
| ### LoRA |
| Download: |
| ``` |
| https://huggingface.co/SnJake/Ref2Font/blob/main/Ref2FontV2.safetensors |
| ``` |
| Place in: `ComfyUI/models/loras` |
|
|
| ## ⚠️ IMPORTANT: V3 Required Prompts |
|
|
| **For Latin ("Aa" reference):** |
| > A technical font atlas grid of the Latin charset: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789!?.,;:-"&". The style is strictly derived from the reference image "Aa". |
|
|
| **For Cyrillic ("Аа" reference):** |
| > A technical font atlas grid of the Cyrillic charset: "АБВГДЕЁЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЫЬЭЮЯабвгдеёжзийклмнопрстуфхцчшщъыьэюя0123456789!?.,;:-"&". The style is strictly derived from the reference image "Аа". |
|
|
| ### Input image rules |
| - **Strict black & white only** (no gray, no shadows, no volume) |
| - **1280×1280** (recommended) |
| - Follow the examples in `Example/` |
|
|
| ## Post-processing: Atlas → TTF |
| Use the included pipeline script to convert the atlas into a TTF. |
|
|
| ### Example command (Windows) |
| ``` |
| python flux_pipeline.py ^ |
| --input "path\to\your_atlas.png" ^ |
| --output-dir "output\folder" ^ |
| --no-upscale ^ |
| --use-grid ^ |
| --simplify 0.5 ^ |
| --canvas 1280 ^ |
| --contour-level 0.5 ^ |
| --trace-scale 4 ^ |
| --trace-blur 1.0 ^ |
| --smooth-iters 2 ^ |
| --baseline-mode auto ^ |
| --align-mode visual ^ |
| --keep-components 4 ^ |
| --min-component-area 3 ^ |
| --component-center-bias 0.65 ^ |
| --cell-bleed 0.4 ^ |
| --cell-bleed-max 10 ^ |
| --core-overlap-min 0.35 ^ |
| --charset "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789!?.,;:-""&" ^ |
| --no-auto-invert |
| ``` |
|
|
| ``` |
| python flux_pipeline.py ^ |
| --input "path\to\your_atlas.png" ^ |
| --output-dir "output\folder" ^ |
| --no-upscale ^ |
| --use-grid ^ |
| --simplify 0.5 ^ |
| --canvas 1280 ^ |
| --contour-level 0.5 ^ |
| --trace-scale 4 ^ |
| --trace-blur 1.0 ^ |
| --smooth-iters 2 ^ |
| --baseline-mode auto ^ |
| --align-mode visual ^ |
| --keep-components 4 ^ |
| --min-component-area 3 ^ |
| --component-center-bias 0.65 ^ |
| --cell-bleed 0.4 ^ |
| --cell-bleed-max 10 ^ |
| --core-overlap-min 0.35 ^ |
| --charset "АБВГДЕЁЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЫЬЭЮЯабвгдеёжзийклмнопрстуфхцчшщъыьэюя0123456789!?.,;:-""&" ^ |
| --no-auto-invert |
| ``` |
|
|
| ## Notes |
| - `flux_upscale.py` is optional; you can skip it with `--no-upscale`. |
| - If the atlas looks inverted, try removing `--no-auto-invert` or add `--invert`. |
