--- title: Z-Image-Turbo-Fun-Controlnet-Union-2.1 canonical_url: "https://www.modelscope.ai/models/PAI/Z-Image-Turbo-Fun-Controlnet-Union-2.1" md_url: "https://www.modelscope.ai/models/PAI/Z-Image-Turbo-Fun-Controlnet-Union-2.1.md" repository: PAI/Z-Image-Turbo-Fun-Controlnet-Union-2.1 last_updated: 2026-02-26 license: apache-2.0 pipeline_tag: text-to-image-synthesis tasks: - text-to-image-synthesis parameters: 26.5B tensor_type: - BF16 library_name: - safetensors - pytorch frameworks: - Pytorch downloads: 551 stars: 3 --- # Z-Image-Turbo-Fun-Controlnet-Union-2.1 > Z-Image-Turbo-Fun-Controlnet-Union-2.1 - An open-source model by PAI on ModelScope. Z-Image-Turbo-Fun-Controlnet-Union-2.1 PAI/Z-Image-Turbo-Fun-Controlnet-Union-2.1 is a 26.5B-parameter text-to-image-synthesis model on ModelScope. licensed under apache-2.0. - **Repository**: PAI/Z-Image-Turbo-Fun-Controlnet-Union-2.1 - **License**: apache-2.0 - **Tasks**: text-to-image-synthesis - **Parameters**: 26.5B - **Downloads**: 551 - **Stars**: 3 - **Last updated**: 2026-02-26 Source: https://www.modelscope.ai/models/PAI/Z-Image-Turbo-Fun-Controlnet-Union-2.1 --- # Z-Image-Turbo-Fun-Controlnet-Union-2.1 [![Github](https://img.shields.io/badge/🎬%20Code-VideoX_Fun-blue)](https://github.com/aigc-apps/VideoX-Fun) ## Update - **[2026.02.26]** Update to version 2602, with support for Gray Control. - **[2026.01.12]** Update to version 2601, with support for Scribble Control. Added lite models (1.9GB, 5 layers). Retrained Control and Tile models with enriched mask varieties, improved training schedules, and multi-resolution control images (512~1536) to fix mask pattern leakage and large `control_context_scale` artifacts. - **[2025.12.22]** Performed 8-step distillation on v2.1 to restore acceleration lost when applying ControlNet. Uploaded a tile model for super-resolution. - **[2025.12.17]** Fixed v2.0 typo (`control_layers` used instead of `control_noise_refiner`), which caused double forward pass and slow inference. Speed restored in v2.1. ## Model Card ### a. 2602 Models | Name | Description | |--|--| | Z-Image-Turbo-Fun-Controlnet-Union-2.1-2602-8steps.safetensors | Supports multiple control conditions (Canny, Depth, Pose, MLSD, Hed, Scribble, and Gray).| | Z-Image-Turbo-Fun-Controlnet-Union-2.1-lite-2602-8steps.safetensors | Same training scheme as the 2601 version, but with control applied to fewer layers. Supports multiple control conditions (Canny, Depth, Pose, MLSD, Hed, Scribble, and Gray). | ### b. 2601 Models | Name | Description | |--|--| | Z-Image-Turbo-Fun-Controlnet-Union-2.1-2601-8steps.safetensors | Compared to the old version, this model uses more diverse masks, a more reasonable training schedule, and multi-resolution control images (512–1536) instead of single resolution (512). This reduces artifacts and mask information leakage while improving robustness. Supports multiple control conditions (Canny, Depth, Pose, MLSD, Hed, and Scribble). | | Z-Image-Turbo-Fun-Controlnet-Tile-2.1-2601-8steps.safetensors | Compared to the old version, uses higher training resolution and a more refined distillation schedule, reducing bright spots and artifacts. | | Z-Image-Turbo-Fun-Controlnet-Union-2.1-lite-2601-8steps.safetensors | Same training scheme as the 2601 version, but with control applied to fewer layers, resulting in weaker control. This allows for larger control_context_scale values with more natural results, and is also better suited for lower-spec machines. Supports multiple control conditions (Canny, Depth, Pose, MLSD, Hed, and Scribble). | | Z-Image-Turbo-Fun-Controlnet-Tile-2.1-lite-2601-8steps.safetensors | Same training scheme as the 2601 version, but with control applied to fewer layers, resulting in weaker control. Allows larger control_context_scale values with more natural results, and better suits lower-spec machines. | ### c. Models Before 2601 | Name | Description | |--|--| | Z-Image-Turbo-Fun-Controlnet-Union-2.1-8steps.safetensors | Distilled from version 2.1 using an 8-step distillation algorithm. Compared to version 2.1, 8-step prediction yields clearer images with more reasonable composition. Supports Canny, Depth, Pose, MLSD, and Hed. | | Z-Image-Turbo-Fun-Controlnet-Tile-2.1-8steps.safetensors | A Tile model trained on high-definition datasets (up to 2048×2048) for super-resolution, distilled using an 8-step algorithm. 8-step prediction is recommended. | | Z-Image-Turbo-Fun-Controlnet-Union-2.1.safetensors | A retrained model fixing the typo in version 2.0, with faster single-step speed. Supports Canny, Depth, Pose, MLSD, and Hed. However, like version 2.0, some acceleration capability was lost during training, requiring more steps and cfg. | | Z-Image-Turbo-Fun-Controlnet-Union-2.0.safetensors | ControlNet weights for Z-Image-Turbo. Compared to version 1.0, more layers are modified with longer training. However, a code typo caused layer blocks to forward twice, resulting in slower speed. Supports Canny, Depth, Pose, MLSD, and Hed. Some acceleration capability was lost during training, requiring more steps. | ## Model Features - This ControlNet is applied to 15 layer blocks and 2 refiner layer blocks (Lite models: 3 layer blocks and 2 refiner layer blocks). It supports multiple control conditions including Canny, HED, Depth, Pose, and MLSD (supporting Scribble in 2601 models and Gray in 2602 models). - Inpainting mode is also supported. For inpaint mode, use a larger `control_context_scale` for better image continuity. - **Training Process:** - **2.0:** Trained from scratch for 70,000 steps on 1M high-quality images (general and human-centric content) at 1328 resolution with BFloat16 precision, batch size 64, learning rate 2e-5, and text dropout ratio 0.10. - **2.1:** Continued training from 2.0 weights for 11,000 additional steps after fixing a typo, using the same parameters and dataset. - **2.1-8-steps:** Distilled from version 2.1 using an 8-step distillation algorithm for 5,500 steps. - **Note on Steps:** - **2.0 and 2.1:** Higher `control_context_scale` values may require more inference steps for better results, likely because the control model has not been distilled. - **2.1-8-steps:** Use 8 steps for inference. - Adjust `control_context_scale` (optimal range: 0.65–1.00) for stronger control and better detail preservation. A detailed prompt is highly recommended for stability. - In versions 2.0 and 2.1, applying ControlNet to Z-Image-Turbo caused loss of acceleration capability and blurry images. For strength and step count testing details, refer to [Scale Test Results](#scale-test-results) (generated with version 2.0). ## Results ### a. Difference between 2.1-8steps and 2.1-2601-8steps. The old 8-steps model had bright spots/artifacts when the control_context_scale was too large, while the new version does not.
Z-Image-Turbo-Fun-Controlnet-Union-2.1-8steps Z-Image-Turbo-Fun-Controlnet-Union-2.1-2601-8steps
The old 8-steps model sometimes learned the mask information and tended to completely fill the mask during removal, while the new version does not.
Z-Image-Turbo-Fun-Controlnet-Union-2.1-8steps Z-Image-Turbo-Fun-Controlnet-Union-2.1-2601-8steps
### b. Difference between 2.1 and 2.1-8steps. 8 steps results:
Z-Image-Turbo-Fun-Controlnet-Union-2.1-8steps Z-Image-Turbo-Fun-Controlnet-Union-2.1
### c. Generation Results With 2.1-lite-2601-8steps Shares the same training scheme as the 2601 version, but with control applied to fewer layers, resulting in weaker control. This allows for larger control_context_scale values with more natural results, and is also better suited for lower-spec machines.
Pose Output
Pose Output
Canny Output
### d. Generation Results With 2.1-2601-8steps
Depth Output
Pose + Inpaint Output
Pose + Inpaint Output
Pose Output
Pose Output
Pose Output
Canny Output
HED Output
Depth Output
Low Resolution High Resolution
### e. Gray Control Results with 2602 Models
Low Resolution High Resolution
## Inference Go to the VideoX-Fun repository for more details. Please clone the VideoX-Fun repository and create the required directories: ```sh # Clone the code git clone https://github.com/aigc-apps/VideoX-Fun.git # Enter VideoX-Fun's directory cd VideoX-Fun # Create model directories mkdir -p models/Diffusion_Transformer mkdir -p models/Personalized_Model ``` Then download the weights into models/Diffusion_Transformer and models/Personalized_Model. ``` 📦 models/ ├── 📂 Diffusion_Transformer/ │ └── 📂 Z-Image-Turbo/ ├── 📂 Personalized_Model/ │ ├── 📦 Z-Image-Turbo-Fun-Controlnet-Union-2.1.safetensors │ ├── 📦 Z-Image-Turbo-Fun-Controlnet-Union-2.1-8steps.safetensors │ └── 📦 Z-Image-Turbo-Fun-Controlnet-Tile-2.1-8steps.safetensors ``` Then run the file `examples/z_image_fun/predict_t2i_control_2.1.py` and `examples/z_image_fun/predict_i2i_inpaint_2.1.py`.
(Obsolete) Scale Test Results: ## Scale Test Results The table below shows the generation results under different combinations of Diffusion steps and Control Scale strength: | Diffusion Steps | Scale 0.65 | Scale 0.70 | Scale 0.75 | Scale 0.8 | Scale 0.9 | Scale 1.0 | |:---------------:|:----------:|:----------:|:----------:|:---------:|:---------:|:---------:| | **9** | ![](results/scale_test/9_scale_0.65.png) | ![](results/scale_test/9_scale_0.70.png) | ![](results/scale_test/9_scale_0.75.png) | ![](results/scale_test/9_scale_0.8.png) | ![](results/scale_test/9_scale_0.9.png) | ![](results/scale_test/9_scale_1.0.png) | | **10** | ![](results/scale_test/10_scale_0.65.png) | ![](results/scale_test/10_scale_0.70.png) | ![](results/scale_test/10_scale_0.75.png) | ![](results/scale_test/10_scale_0.8.png) | ![](results/scale_test/10_scale_0.9.png) | ![](results/scale_test/10_scale_1.0.png) | | **20** | ![](results/scale_test/20_scale_0.65.png) | ![](results/scale_test/20_scale_0.70.png) | ![](results/scale_test/20_scale_0.75.png) | ![](results/scale_test/20_scale_0.8.png) | ![](results/scale_test/20_scale_0.9.png) | ![](results/scale_test/20_scale_1.0.png) | | **30** | ![](results/scale_test/30_scale_0.65.png) | ![](results/scale_test/30_scale_0.70.png) | ![](results/scale_test/30_scale_0.75.png) | ![](results/scale_test/30_scale_0.8.png) | ![](results/scale_test/30_scale_0.9.png) | ![](results/scale_test/30_scale_1.0.png) | | **40** | ![](results/scale_test/40_scale_0.65.png) | ![](results/scale_test/40_scale_0.70.png) | ![](results/scale_test/40_scale_0.75.png) | ![](results/scale_test/40_scale_0.8.png) | ![](results/scale_test/40_scale_0.9.png) | ![](results/scale_test/40_scale_1.0.png) | Parameter Description: Diffusion Steps: Number of iteration steps for the diffusion model (9, 10, 20, 30, 40) Control Scale: Control strength coefficient (0.65 - 1.0)