Edit one picture, or up to six together, with FLUX 3 Image Klein. Image 1 is the picture that changes. Images 2 to 6 are pictures to take from: clothes, a hat, a place, a second person. With Image 1 alone, your words do the edit.
<h3>How to use it</h3>
<ol>
<li>Load the picture you want to change as Image 1.</li>
<li>To take from other pictures, load them as Image 2 and up, and switch each one on in the card. For an edit with words alone, leave them off.</li>
<li>In the box over each picture, type what to take from it: "jacket", "straw hat", "outfit".</li>
<li>Run.</li>
</ol>
It opens set up for clothes: Outfit swap and Auto prompt are on. The prompt box is optional: add anything else there, like "keep her own shoes". For another kind of edit, switch Outfit swap off and write what to do in the prompt box: "make it snow", or "Change the background of image 1 to the staircase in image 2."
<h3>The switches</h3>
<ul>
<li>Image 2 to Image 6. One switch for each picture to take from. Switch them on in order: a picture that is off is passed over and the next one takes its number.</li>
<li>Auto prompt. Qwen3-VL looks at your pictures and writes the full instruction from the boxes or a few words of yours. What it wrote shows in Show Text. Off, your prompt goes to FLUX 3 as typed and the boxes are not used.</li>
<li>Outfit swap. For changing clothes. With Auto prompt on too, Qwen3-VL names each piece and puts it on the right image number.</li>
</ul>
Image 2, Auto prompt and Outfit swap are on as the file opens. Image 3 to Image 6 are off.
<h3>What you need</h3>
<ul>
<li>ComfyUI 0.41.0 or newer. That is the first version with FLUX 3.</li>
<li>AusBoss nodes 2.13.0 or newer. In ComfyUI-Manager, search "AusBoss". Already have them? Update first.</li>
<li>The FLUX 3 Image Klein files. They are on Hugging Face behind a license click: open <a target="_blank" rel="ugc" href="https://huggingface.co/black-forest-labs/flux-3-image-klein-comfy">black-forest-labs/flux-3-image-klein-comfy</a>, sign in and accept, then these links work.<ul>
<li><a target="_blank" rel="ugc" href="https://huggingface.co/black-forest-labs/flux-3-image-klein-comfy/resolve/main/diffusion_models/flux3_image_klein_sd_int8_convrot.safetensors">flux3_image_klein_sd_int8_convrot.safetensors</a> → <code>models/diffusion_models</code> · 5.83 GB</li>
<li><a target="_blank" rel="ugc" href="https://huggingface.co/black-forest-labs/flux-3-image-klein-comfy/resolve/main/text_encoders/qwen3vl_4b_int8_convrot.safetensors">qwen3vl_4b_int8_convrot.safetensors</a> → <code>models/text_encoders</code> · 4.86 GB</li>
<li><a target="_blank" rel="ugc" href="https://huggingface.co/black-forest-labs/flux-3-image-klein-comfy/resolve/main/vae/flux2-vae.safetensors">flux2-vae.safetensors</a> → <code>models/vae</code> · 336 MB</li>
</ul>
</li>
<li>For Auto prompt: <a target="_blank" rel="ugc" href="https://huggingface.co/Comfy-Org/Qwen-Image-2.1/resolve/main/text_encoders/qwen3vl_8b_int8_convrot.safetensors">qwen3vl_8b_int8_convrot.safetensors</a> → <code>models/text_encoders</code> · 9.35 GB. It is Qwen Image 2.1's text encoder, so you may have it already. FLUX 3's own text encoder mixed up the picture numbers in 4 of my 5 tests; this one got all 5 right.</li>
</ul>
These are the INT8 files, the same ones ComfyUI's own FLUX 3 template uses. The full-size BF16 files are on the same Hugging Face page for bigger cards (11.1 GB and 8.88 GB): pick them in Diffusion model and Text encoder.
<h3>Tips</h3>
<ul>
<li>Call the pictures by number: "the jacket from image 2". When I named the pieces without their numbers, her socks were changed too in 4 of 4 runs; with the numbers they stayed in 8 of 8. The boxes and Auto prompt do the numbering for you.</li>
<li>Say what stays: "Keep her face, hair, pose and the background exactly the same."</li>
<li>Write a place as a change to Image 1: "Change the background of image 1 to the street from image 2."</li>
<li>Crop a picture to the thing you want taken from it. Drag the blue handles.</li>
<li>A wrong word gets drawn. If a piece comes out with the wrong color or pattern, read Show Text. Copy the sentence into your prompt, fix the word and run with Auto prompt off.</li>
<li>Shoes need the feet in Image 1. Leave shoes out when Image 1 does not show the feet.</li>
<li>Image 1 runs at 2 megapixels and the others at 0.5. The result has the size and shape of Image 1. To change it, set Megapixels on a picture node.</li>
<li>Times on an RTX 5090: 12 to 15 seconds for most runs, up to about 24 with Auto prompt.</li>
</ul>
<h3>What it does not do</h3>
<ul>
<li>No upscale. The result comes out at Image 1's size, about 2 megapixels.</li>
<li>No LoRAs of mine. LoRA Loader is empty, for FLUX 3 Klein LoRAs of your own.</li>
</ul>
The same on Qwen Image 2.1: my <a target="_blank" rel="ugc" href="https://civarchive.com/models/3000002">Qwen Image 2.1 Turbo Multi-Image Edit</a>. To extend a picture with FLUX 3: <a target="_blank" rel="ugc" href="https://civarchive.com/models/3003875">FLUX 3 Image Klein Outpaint</a>.
<h3>Credits</h3>
FLUX 3 Image Klein is by Black Forest Labs, under the FLUX Kommunity License: use of the pictures you make is covered by its rules for outputs (section 2), so read it if you plan to use them commercially. The FLUX 3 files are Black Forest Labs' own ComfyUI versions. Qwen3-VL is by Alibaba Qwen; its ComfyUI file is from Comfy-Org.
v1.0 (2026-10-15): first release.
Questions or bugs: <a target="_blank" rel="ugc" href="https://github.com/ausboss/ComfyUI-AusBoss/issues">GitHub issues</a> or the comments here. Videos on <a target="_blank" rel="ugc" href="https://www.youtube.com/@ausbossdev">YouTube @ausbossdev</a>. More from me on <a target="_blank" rel="ugc" href="https://x.com/Zanzibased">X @Zanzibased</a> and <a target="_blank" rel="ugc" href="https://github.com/ausboss">GitHub</a>.

FLUX 3 Image Klein Single & Multi-Image Edit

First release. Needs ComfyUI 0.41.0 or newer and AusBoss nodes 2.13.0 or newer.

Files with SHA256: af5a3e428c648e9c6c056e82d1ce9797d6c68aa1df760e0cfd3061ff8c9b64e0