Guide Krea 2 with reference images and training-free concept sliders. V11 is the current version to start with, available in package 0.5.0 or newer. Existing V9/V10/Slider V1 workflows keep their original behavior.

V11 subject-plus-style guidance, using synthetic product and graphic references. See the illustrated gallery for the inputs, settings and limitations.

Start with V11

What you want	Open
Guide an image with reference cards	Native V11 Reference starter
Adjust text-defined attributes	Native V11 Concept Slider showcase
Install, connect nodes and understand controls	V11 user guide
Follow concrete prompts and recipes	Nine worked examples
Inspect real V11 outputs	V11 example gallery

Download the raw workflow JSON and drag it into ComfyUI. Follow the model/image setup instructions. These are native ComfyUI workflows; Photo Studio is not required. The reference example needs input images; the slider example does not.

Two V11 instruments

Reference cards assign jobs such as subject, visual style, lighting, layout or a counter-example to input images. Up to 12 cards feed the V11 reference stack. Sign-preserving balance limits signed layer targets; content/revision-aware caching speeds tuning. Recipes, including balanced, retain their established settings.

Load Image → Image Guide Card V11 → Reference Stack Encoder V11 → sampler

Concept Sliders turn descriptions and paired endpoint text into attribute controls. Up to 8 cards feed the V11 slider stack. V11 adds combined budgeting, duplicate/opposite cancellation, per-card timing, height/crowd presets and a smoother transition near zero. No slider training or extra slider weights are needed.

Concept Slider Card V11 → Concept Slider Stack V11 → sampler

Plain prompt	V11 tiny adjustment	V11 working-range adjustment

Same prompt and seed; brightness values 0, +0.05, +3. Tiny values stay closer to neutral, but stronger values can change shape and framing. Reference borders, fine-texture transfer and entangled attributes remain limitations. These are creative controls, not calibrated physical measurements. Reference and slider stacks are separate encoders; a combined image-anchor-plus-slider encoder is not included.

Install

Install Krea Reference through ComfyUI Manager/Registry, or clone this repository into your ComfyUI custom_nodes folder:

cd /path/to/ComfyUI/custom_nodes
git clone https://github.com/kgilper/krea-reference.git

Restart ComfyUI and refresh the browser. Select installed Krea 2 diffusion, Krea Qwen3-VL encoder and Qwen image VAE files. This repo does not ship model weights. See the V11 guide for exact node class names and host requirements.

Recipes, implementation and prior versions

Custom recipe kit and Recipe Builder in web/recipe-builder.html.
V11 technical notes, node index and testing.
Prior-version guides: V10, V9 and Concept Slider V1, with their historical examples and technical papers.

Older nodes, assets and native workflows retain their original paths. Old guide URLs forward to their archive; no saved workflow is migrated automatically.

Support and license

Krea Reference is free. Support development through GitHub Sponsors, or contribute useful issues and examples. MIT license.