---
title: "ComfyUI's ControlNet Auxiliary Preprocessors — ComfyUI Node Inputs, Wiring & Troubleshooting"
description: "Complete reference for ComfyUI's ControlNet Auxiliary Preprocessors (Fannovel16/comfyui_controlnet_aux) in ComfyUI: input pins (image, resolution), output pins (IMAGE (depth, openpose, lineart, scribble)), and Windows setup."
canonical: https://comfy.ink/nodes/controlnet-aux-preprocessors
updated: 2026-10-17
---

# ComfyUI's ControlNet Auxiliary Preprocessors

Converts ordinary RGB photos into DepthAnything maps, DWPose skeletons, LineArt drawings, and ZoeDepth maps for ControlNet. Package: Fannovel16/comfyui_controlnet_aux.

## Facts (2026-10-17)

- **Node / Pack:** ComfyUI's ControlNet Auxiliary Preprocessors
- **Category:** custom-pack
- **Inputs:** image, resolution
- **Outputs:** IMAGE (depth, openpose, lineart, scribble)
- **Source Pack:** Fannovel16/comfyui_controlnet_aux

## What ComfyUI's ControlNet Auxiliary Preprocessors does in a ComfyUI graph

Converts ordinary RGB photos into DepthAnything maps, DWPose skeletons, LineArt drawings, and ZoeDepth maps for ControlNet.

On the canvas, this node accepts `image, resolution` and emits `IMAGE (depth, openpose, lineart, scribble)`. Every pin is color-coded by data type so you cannot accidentally wire a pixel `IMAGE` tensor into a `LATENT` pin without an intermediate encode step.

## Installation and missing-node recovery on Windows

ComfyUI's ControlNet Auxiliary Preprocessors is provided by `Fannovel16/comfyui_controlnet_aux`. Open [ComfyUI-Manager](https://comfy.ink/nodes/comfyui-manager), click **Install Custom Nodes** (or **Install Missing Custom Nodes** if you loaded a workflow with red boxes), and restart the server.

Download the full Windows desktop or portable package at [/download](https://comfy.ink/download) to get started with a clean Python 3.12 environment.

## FAQ

### How do I fix "ComfyUI's ControlNet Auxiliary Preprocessors" showing up as a red box in ComfyUI?

Open [ComfyUI-Manager](https://comfy.ink/nodes/comfyui-manager), click **Install Missing Custom Nodes**, install `Fannovel16/comfyui_controlnet_aux`, and restart ComfyUI.

### What are the main inputs and outputs of ComfyUI's ControlNet Auxiliary Preprocessors?

Inputs: image, resolution. Outputs: IMAGE (depth, openpose, lineart, scribble).

## Related

- [ComfyUI Nodes Reference](https://comfy.ink/nodes)
- [ComfyUI-Manager](https://comfy.ink/nodes/comfyui-manager)
- [How to Fix Red Missing Nodes in ComfyUI Workflows](https://comfy.ink/howto/fix-missing-custom-nodes-red-boxes)
- [ComfyUI Studio Workspace](https://comfy.ink/studio)
- [KSampler & KSampler (Advanced)](https://comfy.ink/nodes/ksampler)

## Download

Free desktop app: [Download Comfy](https://comfy.ink/download)

Markdown mirror: https://comfy.ink/nodes/controlnet-aux-preprocessors.md