FLUX.2 Klein T2I – 4 Stage Quality Workflow

This workflow is designed to push FLUX.2 Klein text-to-image generations through a clean 4-stage quality refinement process. It’s built to be easy to follow, easy to tweak, and focused on producing polished final images without turning the graph into a total nightmare.

The workflow starts with a base FLUX.2 Klein generation, then moves into additional sampling refinement using res_2s, Detail Daemon, and a controlled Phase 2 denoise slider. From there it runs FaceDetailer for facial cleanup, then finishes with color balancing, color adjustment, Foolhardy Remacri upscaling, CAS sharpening, and a final resize to 1920px on the longest side.

Step-by-step previews are included for Phase 1, Phase 2, Phase 3, and the final Phase 4 output, along with an image comparer so you can directly compare the first pass against the finished render.

FLUX.2 Klein is already fast and flexible, but this workflow is built to give it a more polished final look with better detail, cleaner faces, sharper output, and a more finished editorial-style render.

Node packs used in this workflow

rgthree-comfy
Power Lora Loader (rgthree)

Image Comparer (rgthree)

ComfyUI Impact Pack
FaceDetailer

SAMLoader

ComfyUI Impact Subpack
UltralyticsDetectorProvider

ComfyUI KJNodes
Patch Sage Attention KJ

ModelPatchTorchSettings

GetNode

SetNode

Detail Daemon
DetailDaemonSamplerNode

DetailDaemonGraphSigmasNode

ComfyUI Easy Use
easy seed

easy int

easy cleanGpuUsed

ComfyUI LogicUtils
StaticNumberInt

ResizeLongestToNode

MixLab Nodes
FloatSlider

ComfyUI Essentials
ImageCASharpening+

WAS Node Suite
Upscale Model Loader

Core ComfyUI nodes
UNETLoader

CLIPLoader

VAELoader

CLIPTextEncode

EmptyLatentImage

KSamplerAdvanced

KSamplerSelect

BasicScheduler

CFGGuider

RandomNoise

SamplerCustomAdvanced

KSampler

VAEDecode

ImageUpscaleWithModel

PreviewImage

SaveImage</code></pre><h3 id="models-used">Models  Used</h3><pre><code>flux2-vae.safetensors

qwen_3_8b.safetensors
4x_foolhardy_Remacri.pth
face_yolov8m.pt
sam_vit_b_01ec64.pth
SageAttention