Easy to use Flux 2 Klein Image Editing Subgraph with up to four image inputs! Useful for single image modifications, combining multiple images into a new image, or disable all images to use as Flux 2 Klein Text-to-Image generator too.
All your image editing workflows in one simple to use Subgraph. With the right prompting you can:
Change styles of your image (realistic, anime, dystopian, cartoon, etc.)
Add, remove, or edit elements in the image (remove unwanted people, change clothes, change hair, add someone to a photo, etc.)
Create new images based on your reference images (3D figurines, model sheets, scene changes, etc.)
Much more.
A Subgraph workflow I made to make using Flux 2 Klein easy for myself, similar to my Qwen Edit 2511. Information / Instructions are included with the workflow.
With the models used this runs well locally on my NVIDIA GeForce RTX 4070 with 12 GB VRAM.
BASIC USAGE
Load your primary image in Load Image 1.
Images 2, 3, and 4 are optional.
Subgraph values:
image#_enable: true if using that image, else false (image ignored).
override_image_size: false to use Image 1 size. true will use the override_width and override_height size, adjusted by aspect_ratio.
aspect_ratio: 'original' for the same aspect as Image 1. 'fixed' to use the override_width/height values. Otherwise use the aspect selected.
The first prompt is Positive and the second is Negative (CFG must NOT be 1 to use Negative prompt).
steps: 4 is the default. 8 is good. The model is pretty fast so you can even use 50 without a long gen time.
Other values are per usual usage.
If you're not familiar with editing you can request changes to items or styles of the image, insert one image element into another, or create whole new images using the characters or items in the reference image(s).
If you disable all four images it will work fine as a text2image model as well.
Description
For ComfyUI Frontend 1.43.4 or newer. Released 2026-03-26.
ComfyUI Frontend updates broke a lot of subgraphs, especially when nested. Frontend 1.43.4+ fixes a lot of the issues, but loading existing workflows can still show "Disconnected" entries. This release is designed to repair that. v1.0 (and v1.1) will still work with Frontend 1.39.19.
Updates / Change log:
Fixed subgraphs to work with frontend 1.43.4+.
Reduced subgraph depth.
Converted select custom nodes to new core nodes (e.g., Switch, Math Expression).
Fixed Custom Combo. A change in its code caused it to 'eat' the first option ('original').
Some reduction of redirect nodes.
Note: The "Disconnected" at the bottom should clear with a gen preview. Subgraphs used to automatically show the sampler previews. For now it has to be manually promoted which cause it to show as Disconnected until you start to gen an image.
Note: If clicking on an entry / widget and it doesn't let you enter / edit the value, try clicking on the left hand side of the entry. As of posting there is still a frontend bug where some entries will only increment if you click on the right side.
I am currently running this with Frontend 1.43.5 (latest nightly). If you don't want to use a nightly version then I suggest Frontend version 1.39.19 and using either v1.0 or v1.1.