seedance 2.0 guide

### 1. Multimodal Input Limits
| Type | Format | Quantity | Size |
|---|---|---|---|
| **Images** | jpg/png/webp | ≤ 9 | <30MB |
| **Videos** | mp4/mov | ≤ 3 (2-15s) | <50MB |
| **Audio** | mp3/wav | ≤ 3 (<15s) | <15MB |
| **Total** | **≤ 12 files** | - | - |

> 💡 **CREATIVE TIP**: To achieve high-quality character consistency, prioritize **Stylized Transformation** (e.g., @image1 in 3D cartoon style) or **Cinematic Framing** (e.g., side profile, silhouette).

### 2. @ Reference Syntax
You must use `@filename` to clearly specify the use of the material:
-   `@image1 as start frame`
-   `@image2 as character reference`
-   `@video1 for camera movement and rhythm reference`
-   `@audio1 as background music`

---

## Interactive Workflow

Please follow these steps to guide the user:

### Step 1: Concept
Ask the user:
1.  **What kind of video do you want to make?** (Narrative, advertisement, camera movement replication, special effects?)
2.  **What is the duration?** (Default is 15s)
3.  **What materials do you have?** (Images, videos, audio)

### Step 2: Details
Based on the user's answers, supplement missing information:
-   **Style**: Cinematic, anime, ink wash, cyberpunk?
-   **Camera Movement**: Push/pull, pan, tilt, Hitchcock zoom, long take?
-   **Sound**: Do you need background music, sound effects, or dialogue?

### Step 3: Generate Prompt
Output standard **storyboard prompts** using either the **Basic** or **Advanced** template based on the user's needs.

---

## Prompt Structure Template

### 1. Basic (Storyboard Script)
Best for: Quick ideas, simple narratives.

```markdown
【Overall Setting】
Style: [Cinematic Realistic/Animation/Sci-Fi...]
Duration: [15s]
Aspect Ratio: [16:9 / 2.35:1]

【Storyboard Script】
0-3s: [Camera + Visual] Camera slowly zooms in, the protagonist in @image1 stands at...
3-6s: [Action + Effect] Referencing the actions in @video1, the protagonist starts to...
6-12s: [Climax] Camera rotates around, lighting becomes...
12-15s: [Ending] Image freezes, subtitles emerge...

【Sound Design】
BGM: [Emotion/Style]
Sound Effects: [Specific sounds]

【Material Reference】
@image1 Start frame
@video1 Action reference
```

### 2. Advanced (Directorial Breakdown)
Best for: High-precision restoration, complex scenes, e-commerce.

```markdown
【Directorial Breakdown】
SUBJECTS: [Detailed character/object description, e.g., muscle lines, material texture]
ENVIRONMENT: [Lighting, weather, interior/exterior details]
MOOD/STYLE: [Color grade, cinematic feel, emotion]

【Timeline】
0-5s (Segment 1): [Detailed action + Camera directives]. Use 【@asset】 brackets to anchor visuals to text.
5-10s (Segment 2): [Detailed action + Camera directives].
10-15s (Segment 3): [Ending/Climax].

【Technical Requirements】
Camera: [e.g., 1-to-1 restoration of @video1, Close-up quick push-in, Handheld feel]
Visual Consistency: [Strictly refer to @image1 for character appearance]

【Sound & Voice】
Voice Tone: [e.g., Passionate explaining, calm narration]
Sound Effects: [Precise timing for SFX]

【Material Reference】
@image1 Subjects/Character
@video1 Motion/Camera reference
```

---

## Advanced Techniques

### 1. Video Extension
-   **Instruction**: `Extend @video1 by 5s`
-   **Note**: The generated length should select the duration of the **"newly added part"**.

### 2. Camera/Motion Cloning (1-to-1 Restoration)
-   **Instruction**: `Completely reference the camera movement and lens language of @video1` or `Restore the motion of @video1 1-to-1`.
-   **Note**: Ensure the camera movement or character action in the reference video is clear.

### 3. Expression/Motion Transfer
-   **Instruction**: `Maintain the character image from @image1 and replicate the expressions and actions from @video1`.

### 4. Brackets Anchoring
-   **Instruction**: Use `【...】` brackets to anchor specific attributes or asset references directly within the script (e.g., `A woman 【@image1】 holding a watch 【@image2】`).

### 5. Video Editing/Plot Subversion
-   **Instruction**: `Subvert the plot of @video1, at 5s let the protagonist...`

---

## 🎨 Creative Strategy: Artistic Stylization & Composition

To achieve optimal artistic results and maintain high-quality stylistic consistency, follow these advanced creative techniques:

### 1. Artistic Abstraction (Style Harmonization)
Don't use raw realistic photos. Convert the character image (@image1) into a stylized version before/during prompt generation:
-   **Keywords**: `3D Cartoon`, `C4D Render`, `Cyberpunk Oil Painting`, `Ukiyo-e`, `Claymorphism`.
-   **Effect**: Retains character features (bones, hair, clothing) while achieving a cohesive, non-photorealistic artistic look.

### 2. Cinematic Framing & Perspective (Subject Integration)
Focus on dynamic perspectives rather than standard close-up portraits.
-   **Back View / Side Profile**: Focus on the character's back or silhouette.
-   **Distance**: Use `Long Shot` or `Extreme Wide Shot`. Ensure the face occupies less than 20% of the screen.
-   **Lighting**: Use `Strong Silhouette`, `Heavy Shadows`, or `Backlighting` to obscure facial details.

### 3. Multi-View Layout (Character Sheet)
If maintaining consistency is key, use a "Character Sheet" format for @image1:
-   **Layout**: 3-view or 4-view (Front, Side, Back) on a pure white background.
-   **Prompt**: "Character sheet of a girl 【@image1】, multi-view, white background, A-pose."

### 4. Focused Detail & Depth Control
-   **Technique**: Use an image where the main face is slightly blurred or out of focus, but include a clear detail (like an eye or hand) in a small inset or side panel.
-   **Prompt**: "A cinematic shot of a woman 【@image1】, shallow depth of field, face softly blurred, focus on the shimmering earrings."

### 5. Stylistic Descriptor Optimization
Replace sensitive "biological" terms with "digital" or "artistic" ones:
-   **Instead of**: "Realistic woman", "Real face", "Skin texture".
-   **Use**: "CGI Digital Human", "High-poly 3D Model", "Sculpted Porcelain Face", "Android shell".

---

## Avoid Pitfalls
1.  **Vague References**: Don't just write `reference @video1`; specify **what** to reference (camera movement? action? or lighting?).
2.  **Conflicting Instructions**: Do not request "fixed camera" and "orbiting movement" at the same time.
3.  **Overload**: Do not cram too many complex action descriptions into 3 seconds.
4.  **Face Centering**: Avoid placing the face in the dead center of the frame if it's high-realism; this is the first place the system checks.