WorkflowListedExternal

flux2_klein-SDXL_Upscale_workflow (T2i)

The purpose of this workflow is to mix flux2klein excellent prompt tracking and high image quality with illustrious- SDXL's vast AGC character resources.

Sourcecivitai.com/models/2312904

TaskMultiCapabilitiesImage to image · UpscalingFamilyFLUXEstimated VRAMEstimate unavailableBgrade

Runtime profile

Access: External workflow
Status: Listed
Source: Civitai
Updated: Jul 18, 2026

Source description

flux2_klein-SDXL_Upscale_workflow

(text to image upscale)

The purpose of this workflow is to mix flux2_klein excellent prompt tracking and high image quality with illustrious- SDXL's vast AGC character resources.

In other words, characters that flux2_klein has not yet learned can be expressed using illustrious-SDXL's learned resources without using Lora.

It combines flux2_klein and SDXL for extremely fast generation speeds .

This is how I use it, but it's up to you to use it in your own way.

AI-generated commentary

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

Purpose

This workflow is for text-to-image generation with optional upscaling: it combines flux2_klein prompt tracking with illustrious-SDXL character resources, takes a text prompt, and produces a rendered image or an upscaled image.

Flow

For characters that flux2_klein has not learned, it can use illustrious-SDXL's learned resources without a LoRA.
You can also use it as a regular flux2_klein workflow.

Inputs and outputs

Provide a text prompt to generate a rendered image; the workflow also supports an upscaled image.

Setup

Use ComfyUI version 0.9.1 or higher.

Dependencies

The named node packs are ComfyUI-Custom-Scripts (1.2.5), ComfyUI-Easy-Use (9947b8be70e17ceabafa4fa7f476b54626de4704), comfyui-mute-bypass-by-ID (2.0.0), and images-grid-comfy-plugin (2.6.0).
The named model files include flux-2-klein-4b-fp8.safetensors, qwen_3_4b.safetensors, flux2-vae.safetensors, and dmd2_sdxl_4step_lora_fp16.safetensors.
It also names lollypop.pth and Luc_meqemeqe-SR.safetensors.

Configuration

Turn off Upscale-Switch to render only flux2_klein; in that mode, the workflow does not upscale anything.
For upscaling, use a ratio from 1.5 to 2.0; 1.5 is recommended.
Suggestion · not verified

Cautions

Verify whether your setup should use flux-2-klein-4b-fp8.safetensors or flux-2-klein-4b.safetensors.
Suggestion · not verified
Before use, verify the intended files for the text encoder, VAE, upscaler, and checkpoint: qwen_3_4b.safetensors, flux2-vae.safetensors, lollypop.pth, and Luc_meqemeqe-SR.safetensors.
Suggestion · not verified

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Sources

1 source

CivitaiPrimaryVersion 2602170

civitai.com/models/2312904

Verified Jul 18

Source excerpts

1 excerpt

NoteJul 18civitai.com/models/2312904

Source context: 354 downloads · Type Workflows · Base model Flux.2 D