FLUX.2 Klein 9B — Ultimate All-in-One ComfyUI Workflow v2.0

90 nodes · 6 pipelines · 12 organized groups · 8GB VRAM compatible

One workflow file. Everything you need. No more switching between different JSON files for different tasks.

6 Pipelines in 1 Workflow

Pipeline: What It Does...
🎨 F1: Text → ImageStandard txt2img at 1024×1024
🖼️ F2: Single-Reference KV EditEdit specific elements while preserving everything else
🚀 F3: Face + Pose SwapTake a face from Image A + pose from Image B → combine realistically
🎭 F4: InpaintingManual mask or AI auto-masking → regenerate only masked area
🔀 F5: Image MergeBlend two images with adjustable ratio
✨ RefinerDetail enhancement, lighting correction, skin texture improvement

Built-in Features

🧭 NAG (Normalized Attention Guidance) — Negative prompts that actually work on distilled Flux
🤖 Florence2 Auto-Masking — Type what to mask ("Segment the shirt") → pixel-perfect mask
⬆️ 4x UltraSharp Upscaler — Clean upscaling with detail preservation
🔷 Tiled VAE Decode — All VAE decodes are tiled to prevent OOM on 8GB VRAM
🔗 2-Slot LoRA Chain — Enhancer LoRA always last, add your own LoRAs in the empty slot
📋 Built-in Guide Notes — Download links, prompting tips, and troubleshooting right inside the workflow

Hardware Requirements

Minimum: 8GB VRAM (RTX 3060/4060/4070 with GGUF Q4 model)
Recommended: 10-12GB VRAM (RTX 3080/4070 Ti with FP8 model)
RAM: 16GB+
ComfyUI: Version 0.9.2 or newer

Models You Need

Diffusion Model (pick one):

FP8: flux-2-klein-9b-fp8.safetensors → Download
GGUF Q4 (8GB VRAM): → Download

Text Encoder:

qwen_3_8b_fp8mixed.safetensors → Download

VAE:

flux2-vae.safetensors → Download

Upscale Model:

4x-UltraSharpV2.pth → Download

LoRA:

klein_9b_enhancer_v2.safetensors → Put in models/loras/
download

Custom Nodes (install via ComfyUI Manager):

rgthree-comfy (Image Comparer)
ComfyUI-Florence2 by kijai (auto-masking, optional)
ComfyUI-GGUF by city96 (only if using GGUF models)

How to Use

Load the JSON in ComfyUI
use comphyui manager to install any missing node. ( critical step )
Only the Refiner is active by default — everything else is bypassed
To activate a pipeline: right-click its group header → Set Nodes Mode → Always Execute
To deactivate: right-click → Set Nodes Mode → Bypass ( or bypass groupe nodes )
Read the built-in Note nodes for prompting tips and download links

Prompting Tips

FLUX.2 Klein reads prompts like a novelist, NOT like Stable Diffusion.

Use: Subject → Setting → Details → Lighting → Technical terms

Power words: clean digital file, histogram equalization, gamma correction, studio strobe, shot on Canon EOS R5

Avoid: beautiful, masterpiece, best quality, trending on artstation

For text in images: Put text in quotes → A sign reading "HELLO"

Troubleshooting

OOM: Already using Tiled VAE. Try GGUF Q4 model if still crashing
Black images: Wrong text encoder. 9B needs Qwen3 8B, not 4B
Plastic faces: Make sure enhancer LoRA is active (strength 0.7)
NAG not working: Install ComfyUI-NAG custom node as alternative

Built and tested on RTX 4060 Mobile (8GB VRAM). If you have issues, leave a comment — I'll help you fix it.

If this workflow is useful to you, please leave a review — it helps others find it.

VERSION HISTORY:

v2.1 — Initial public release. +90 nodes, 6 pipelines, NAG, Florence2, Tiled VAE.
added groupe bypasser, notes for new people to comphyui

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