aigen/docs/image-v2.md

Image v1 vs Image v2

Image edit (v1) and Image v2 are siblings. v1 is unchanged. Do not mute-fix workflow_flux2_klein_edit.json (the dual-branch template that deletes 75:* or 92:* at runtime).

	Image edit (v1)	Image v2
Tab	Image edit	Image v2
Route	POST /api/edit	POST /api/v2/generate and POST /v2/generate
Graphs	One file, prune unused branch	klein_v2_edit.json, klein_v2_compose.json, klein_v2_refine.json, klein_v2_generate.json, or krea_v2_generate.json
Second still	Optional; switches branch	Compose only; required. Mismatch is a 400
Mask	—	Refine only; required. Missing mask is a 400, not an Edit fallback
Input still	Required	Edit / Compose / Refine required. Generate ignores stills
LoRAs	Optional user picker	Concept LoRA + Consistency (Flux). Generate Consistency off. Krea Generate has no Consistency
Defaults	20 steps, CFG 1	Flux: 24 steps, CFG 4 (turbo: 8 / 1). Krea Generate: 8 steps, CFG 1

Poll v2 jobs the same way as v1: GET /api/generate/{id}/stream and GET /api/generate/{id}.

Modes

• edit — one image + text. Task is scene. Sending image_b is rejected. Use this to change lighting, background, or the whole frame from a single still.
• compose — two images + text. image_b is required. No silent one-image fallback. Use this to lock a person from A and pull a face or outfit from B.
• refine — one canvas + a painted mask + text. image_a and mask are required. image_b is ignored. Prompt only what should change inside the mask. Strength is denoise in that region (not CFG). Use this for face / hand / chest fixes without opening Comfy.
• generate — text only. No image_a, image_b, or mask. Size is width × height (768 / 1024 / 1280), not megapixels from a still. Engine is Flux (klein_v2_generate.json) or Krea (krea_v2_generate.json). Edit / Compose / Refine stay Flux.

Compose tasks:

• identity — person from A; B reinforces the face; prompt changes pose/scene
• outfit — person, body, pose, background from A; clothing only from B
• face_lock — body/pose/scene from A; face from B
• scene — A is the edit image; B is style/background

Refine and Generate do not prepend Edit/Compose role headers. The user prompt is the whole prompt.

Dummy tests:

• Compose + two unrelated photos + “keep everything the same” must change the output. If it matches old v1 gens, still B is not connected.
• Refine + last good gen + mask on the left breast + “red X painted on the left breast” at strength 0.4. Pass = X on the breast, face/pose/background stay. Fail = whole image regenerates, or nothing changes.
• Generate + Flux + “a red cube on a white table, studio light” and no stills. Pass = a new image of that. Fail = missing-image error, or the output equals the last Edit/Compose still.
• Generate + Krea + the same prompt. Pass = krea_v2_generate.json is queued. Fail = Flux graph runs under a Krea label, or a missing Krea model falls back to Flux.

Nodes the mapper patches

Edit and Compose:

Node	Role
1	Load Image A (inputs.image)
2 / 23	Scale to MP, lanczos (megapixels)
7	Concept LoRA (lora_name, strength_model, strength_clip)
8	Consistency LoRA (lora_name, strength_model, strength_clip)
9	Positive CLIPTextEncode.text (role header + user prompt on Compose)
10	Negative CLIPTextEncode.text
15	Seed
17	Steps (Flux2Scheduler; Klein-native, euler sampler)
18	CFG
21	SaveImage prefix

Compose only:

Node	Role
22	Load Image B
23	Scale B
24	VAE encode B
25 / 26	Second ReferenceLatent (B fused into pos/neg)

Refine only (klein_v2_refine.json):

Node	Role
1	Load canvas
30	Load mask (white = edit, black = keep)
2	Scale canvas to MP
31 / 32 / 34	Resize mask to canvas, take red channel, grow slightly
33	SetLatentNoiseMask on the encoded canvas
17	BasicScheduler.denoise — this is Strength, not CFG
19	Sampler starts from the masked canvas latent, not an empty Flux2 latent

Generate Flux (klein_v2_generate.json):

Node	Role
14	EmptyFlux2LatentImage at request width × height
17	Flux2Scheduler steps + the same size
7	Concept LoRA (Klein file)
8	Consistency LoRA — removed at runtime when both strengths are 0
9 / 10	Prompt / negative from the API (no leftover widget text)

Generate Krea (krea_v2_generate.json):

Node	Role
4	UNETLoader — krea2_turbo_mxfp8, then nvfp4, then fp8_scaled
5	CLIPLoader type krea2 — qwen3vl_4b_fp8_scaled.safetensors
6	VAELoader — qwen_image_vae.safetensors
14	EmptyLatentImage at request width × height
15	KSampler euler / simple, default 8 steps, CFG 1
9 / 10	Prompt / negative from the API

Krea does not load Klein UNET, Klein CLIP, Klein VAE, Klein Consistency, or the Klein concept LoRA. Missing Krea diffusion / text encoder / VAE fails the job. Concept LoRA on Krea is off unless NUXT_KREA_CONCEPT_LORA is set.

There is no LoadImage. If the executed Generate graph has a required LoadImage, the job fails. v1 node 145 (muted T2I with a baked prompt) is not used.

If image_b is sent on Edit/Compose and the executed graph has fewer than two LoadImage nodes, the job fails. If Refine runs without a mask input or without denoise on the scheduler, the job fails.

Default sliders

Slider	Default
Concept LoRA — Model	0.65 on Flux. 0 on Krea
Concept LoRA — CLIP	0.35 on Flux. 0 on Krea
Consistency — Model	0.70 on Flux Edit/Compose/Refine. Off on Generate
Consistency — CLIP	0.70 on Flux Edit/Compose/Refine. Off on Generate
Steps	24 (turbo 8)
CFG	4 (turbo 1)
Scale to MP	1.0 lanczos
Strength (denoise)	0.35 on Refine only. Hidden on Edit/Compose/Generate. Range 0.15–0.75
Size	Generate only. 1:1 1024×1024, 3:4 768×1024, 4:3 1024×768, 16:9 1280×768, 9:16 768×1280

When to use each Refine strength

Preset	Strength	SNOFS model / CLIP	Consistency	Use for
Face	0.25–0.35 (chip 0.28)	0.55 / 0.25	0.75 / 0.80	Glasses, cheeks, jaw. Keep the rest of the canvas.
Hand / chest	0.35–0.45 (chip 0.40)	0.65 / 0.30	0.70 / 0.70	Hands or chest, local contact. Dummy test uses 0.40.
Heavy	0.55	current sliders	current sliders	Stubborn region that barely moved at 0.40.

Do not raise Strength to rewrite the whole frame. If the face or background moves, the mask is too big or Strength is too high.

• identity / face_lock — keep Consistency at 0.70 / 0.70 so the face from A (identity) or B (face_lock) holds. Do not drop Concept LoRA CLIP below ~0.30 or the skin/body read falls apart.
• outfit — keep Concept LoRA Model ~0.65 so cloth reads; do not raise it past ~0.85 or it starts rewriting the body from A. Consistency stays at 0.70 so the person in A does not become the person in B.
• scene / edit — start at the table defaults. Turbo is for drafts only.
• refine — prompt only the masked change. Face vs hand/chest chips set Strength and LoRAs together.
• generate / Flux — Concept LoRA defaults 0.65 / 0.35. Consistency stays 0. Turbo is 8 steps / CFG 1.
• generate / Krea — 8 steps, CFG 1, no Consistency. Concept LoRA stays 0 unless a Krea concept file is configured.

Presets on this tab store sliders + mode + task + engine (+ Strength when Refine, + size when Generate). They do not load v1 LoRA stacks or a cached latent. Missing engine on an old preset is Flux.