[Flux] ControlNet Union Pro Workflow (Basic, Easy, Simple)

Use this beginner-friendly Flux workflow to combine an input image and Flux text conditioning with Union Pro ControlNet, then preview and save the generated images.

It loads, resizes, and preprocesses the input image, applies ControlNet conditioning, samples, decodes, previews, and saves the result.

The nodes are grouped step by step for clarity.

The main inputs are an image and Flux text conditioning, handled through LoadImage, ImageResizeKJ, AIO_Preprocessor, and CLIPTextEncodeFlux.

The output path uses VAEDecode, PreviewImage, and SaveImage for decoded images, previews, and saved files.

To prepare the ControlNet model, download the Shakker-Labs version from https://huggingface.co/Shakker-Labs/FLUX.1-dev-ControlNet-Union-Pro/tree/main and place the file in C:\ComfyUI_windows_portable\ComfyUI\models\controlnet.

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If ComfyUI reports missing nodes, use its “Install Missing Node” function.

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The model files named for this workflow are clip_l.safetensors, FLUX_VAE.safetensors, FLUX-Union-pro-controlnetV2.safetensors, flux1-dev-Q6_K.gguf, flux1-dev-Q8_0.gguf, and t5-v1_1-xxl-encoder-Q5_K_M.gguf.

The node packs named for this workflow are comfyui_controlnet_aux, comfyui-gguf, comfyui-kjnodes, and rgthree-comfy.

The base model is Flux.1 D.

The workflow uses Flux text encoding and GGUF loaders through CLIPTextEncodeFlux, DualCLIPLoaderGGUF, and UnetLoaderGGUF.

Before running, verify that all six named model files are installed and available, including FLUX-Union-pro-controlnetV2.safetensors and t5-v1_1-xxl-encoder-Q5_K_M.gguf.

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Before running, check which installed node packs provide comfyui_controlnet_aux and comfyui-gguf.

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