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FLUX+Ultimate SD Upscale (Basic Workflow) — v1.0

This workflow is designed to help beginners easily upscale existing images using the FLUX model with the Ultimate SD Upscale node.

TaskMultiCapabilitiesImage to image · UpscalingFamilyFLUXEstimated VRAMNot yet characterizedBgrade

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External workflow
Status
Listed
Source
Civitai
Updated
Aug 29, 2026

Source description

This workflow is designed to help beginners easily upscale existing images using the FLUX model with the Ultimate SD Upscale node.

It’s a very simple setup, stripped of any additional features like LoRA or complex functions, focusing solely on upscaling and image comparison.

This makes it easy to understand and perfect for those new to the process.

Additionally, I’ve included notes within the workflow specifying the required models for each node. Be sure to check them out for smoother usage!

This workflow requires the Image Compare node and the Ultimate SD Upscale node to function properly. If these nodes are not already installed, you can easily add them using the Install Missing Node feature in Comfyui.

[Required Nodes]

Image Compare

Ultimate SD Upscale

[Model Link]

[Direct Links to Download Models]

  1. GGUF

Dev GGUF Download

https://huggingface.co/city96/FLUX.1-dev-gguf/tree/main

Schnell GGUF Download

https://huggingface.co/city96/FLUX.1-schnell-gguf/tree/main

  1. Diffusion Model (FLUX Model Download Location)

https://civitai.com/models/618692/flux

Note: lllyasviel/flux1-dev-bnb-nf4 cannot be used.

(Model Directory)

Place the model in:

C:\ComfyUI_windows_portable\ComfyUI\models\unet\FLUX

  1. FLUX VAE Download Link

Download from:

https://huggingface.co/black-forest-labs/FLUX.1-dev/tree/main/vae

(Directory for VAE)

Place the file in:

C:\ComfyUI_windows_portable\ComfyUI\models\vae

  1. Text Encoder File Download Link

https://huggingface.co/comfyanonymous/flux_text_encoders/tree/main

This model is used in the DualclipLoader node.

(Directory for Text Encoders)

Place the file in:

C:\ComfyUI_windows_portable\ComfyUI\models\clip

  1. Upscale Model

After downloading the .pth file, place it in the following directory:

C:\ComfyUI_windows_portable\ComfyUI\models\upscale_models

============================================================

FLUX 모델을 활용해 기존 이미지를 Ultimate SD Upscale 노드로

간단히 업스케일할 수 있도록 설계되었습니다.

로라(LoRA)나 복잡한 기능은 모두 제외하고,

업스케일과 이미지 비교에만 집중한 매우 간단한 구성이라 초보자도 쉽게 이해하고 활용할 수 있습니다.

또한, 각 노드에 필요한 모델 정보를 메모에 작성해 두었으니

참고하시면 더욱 편리하게 사용하실 수 있습니다!

이 워크플로우를 작동하려면 Image Compare 노드와 Ultimate SD Upscale 노드가 추가로 필요합니다.

만약 이 노드들이 설치되어 있지 않다면, Install Missing Node 기능을 사용해 간단히 설치할 수 있습니다.

[필요한 노드]

Image Compare

Ultimate SD Upscale

[모델 다운로드 다이렉트 링크 모음]

  1. GGUF

Dev GGUF 다운로드

https://huggingface.co/city96/FLUX.1-dev-gguf/tree/main

Schnell GGUF 다운로드

https://huggingface.co/city96/FLUX.1-schnell-gguf/tree/main

  1. Diffusion Model (FLUX 모델 다운로드 위치)

https://civitai.com/models/618692/flux

참고: lllyasviel/flux1-dev-bnb-nf4는 사용할 수 없습니다.

(모델 저장 경로)

모델 파일을 아래 경로에 넣으세요:

C:\ComfyUI_windows_portable\ComfyUI\models\unet\FLUX

  1. FLUX VAE 다운로드 링크

다운로드 링크:

https://huggingface.co/black-forest-labs/FLUX.1-dev/tree/main/vae

(VAE 저장 경로)

파일을 아래 경로에 넣으세요:

C:\ComfyUI_windows_portable\ComfyUI\models\vae

  1. Text Encoder 관련 파일 다운로드 링크

https://huggingface.co/comfyanonymous/flux_text_encoders/tree/main

이 파일은 DualclipLoader 노드에서 사용됩니다.

(텍스트 인코더 저장 경로)

파일을 아래 경로에 넣으세요:

C:\ComfyUI_windows_portable\ComfyUI\models\clip

  1. 업스케일 모델

.pth 파일을 다운로드한 후, 아래 경로에 넣으세요:

C:\ComfyUI_windows_portable\ComfyUI\models\upscale_models

[contact]

Youtube : https://www.youtube.com/@A01demort

Instagram : https://www.instagram.com/a01demort/

Naver Cafe : https://cafe.naver.com/sdfkorea

What you need

Model files
21.2 GiB known subtotal

Remaining hardware or download-size estimates are not available yet.

Requirements

Models

10
  • 4xFaceUpSharpDAT.pth

    Not resolved

    Upscaler · Unknown

  • Text encoder · 235 MB · SAFETENSORS · Unknown

  • DualCLIPLoader

    Possible

    Text encoder · Unknown

  • FLUX_VAE_diffusion_pytorch_model.safetensors

    Not resolved

    VAE · Unknown

  • Checkpoint · 11.8 GB · GGUF · fp16 · Unknown

  • flux1DevFp8_v10.safetensors

    Not resolved

    Checkpoint · Unknown

  • Text encoder · 9.12 GB · SAFETENSORS · Unknown

  • UltimateSDUpscale

    Possible

    Upscaler · Unknown

  • UpscaleModelLoader

    Possible

    Upscaler · Unknown

  • VAELoader

    Possible

    VAE · Unknown

Node packs

7
  • CLIPTextEncodeFlux

    Not resolved

    Node pack · Unknown

  • Image Comparer (rgthree)

    Not resolved

    Node pack · Unknown

  • LoadImage

    Possible

    Node pack · Unknown

  • PreviewImage

    Possible

    Node pack · Unknown

  • SaveImage

    Possible

    Node pack · Unknown

  • UNETLoader

    Possible

    Node pack · Unknown

  • UnetLoaderGGUF

    Possible

    Node pack · Unknown

AI-generated commentary

AI-generated explanation based on source and configuration details. Suggestions are clearly labeled.

Purpose

  • FLUX+Ultimate SD Upscale (Basic Workflow) is for upscaling an existing image with FLUX and Ultimate SD Upscale; it takes an image and is designed to produce an upscaled image, with image comparison, preview, and saving.

Flow

  • It is a simple setup for beginners, focused on upscaling and image comparison without LoRA or complex functions.

Inputs and outputs

  • Input an existing image; the intended result is an upscaled version, with nodes for comparison, preview, and saving.

Setup

  • You’ll need Image Compare and Ultimate SD Upscale; if either is missing, use ComfyUI’s Install Missing Node feature.

Dependencies

  • Listed model filenames include flux1-dev-Q8_0.gguf, t5xxl_fp16.safetensors, and clip_l.safetensors.

  • Other listed filenames are FLUX_VAE_diffusion_pytorch_model.safetensors, flux1DevFp8_v10.safetensors, and 4xFaceUpSharpDAT.pth.

Configuration

  • Place the FLUX model in C:\ComfyUI_windows_portable\ComfyUI\models\unet\FLUX and the VAE file in C:\ComfyUI_windows_portable\ComfyUI\models\vae.

  • Place text encoder files in C:\ComfyUI_windows_portable\ComfyUI\models\clip and the downloaded .pth upscale model in C:\ComfyUI_windows_portable\ComfyUI\models\upscale_models.

  • Tip: Check the workflow’s notes for the model associated with each node.

    Suggestion · not verified

Cautions

  • Avoid lllyasviel/flux1-dev-bnb-nf4; the workflow notes say it cannot be used.

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Sources

1 source
CivitaiPrimary
civitai.com/models/982607

Verified Jul 20

Source excerpts

1 excerpt

Source context: 1452 downloads · Type Workflows · Base model Flux.1 D