# Flux Union ControlNet

## Summary

Control-guided FLUX workflow using Union ControlNet, aimed at steering generation from structural inputs rather than relying only on prompting.

## Model Family

- `flux`

## Status

- `imported-only`

## Source

- Original repo page: <https://huggingface.co/StableDiffusionVN/Flux>
- Workflow file: <https://huggingface.co/StableDiffusionVN/Flux/resolve/main/ComfyUI_workflow/Flux_Union_Controlnet.json>
- Original publisher: `StableDiffusionVN`
- Date imported: `2026-08-08`

## Developer notes

- The publisher lists this as one of the included FLUX example workflows in the same repo as their other ComfyUI examples.
- Their README specifically points to `ComfyUI-eesahesNodes` for InstantX / Union ControlNet support.
- The workflow uses an `AIO_Preprocessor`, so the source expects an installed preprocessor stack as well, not just the loader node.

## Our notes

- This is one of the more practically valuable FLUX workflows because structural control tends to matter more than raw prompting once you actually want repeatability.
- Good candidate if you care about pose, edges, or scene layout staying closer to plan.
- In practice this is the workflow I would keep around when "make it obey the source shape" matters more than style exploration.

## Required custom nodes

- `ComfyUI-eesahesNodes` for `InstantX Flux Union ControlNet Loader`
- a ControlNet preprocessor pack that provides `AIO_Preprocessor`, commonly `comfyui_controlnet_aux`

## Built-in / core nodes used

- `CheckpointLoaderSimple`
- `ControlNetApplySD3`
- `CLIPTextEncode`
- `KSampler`
- `LoadImage`
- `VAEDecode`

## Notes

- Best use: structure-aware FLUX generation, especially when you have edge/depth/pose style guidance.
- This is more useful than plain text-to-image because it pushes FLUX into controlled generation rather than prompt-only luck.