> ## Documentation Index > Fetch the complete documentation index at: https://docs.siray.ai/llms.txt > Use this file to discover all available pages before exploring further. # Seedream 4.0 ref2i > Seedream 4.0 Image-to-Image is a powerful AI model that transforms existing images into enhanced or re-styled visuals while preserving structure, details, and creative intent. ### Model Use Cases Ideal for image editing, style transfer, concept iteration, marketing visuals, and creative production where consistent, high-quality image transformation is required. ### Key Features * **Structure-Aware Transformation:** Retains original layout, proportions, and key elements while applying intelligent visual changes. * **Flexible Style Adaptation:** Supports artistic, realistic, and branded styles without sacrificing image coherence. * **High-Resolution Output:** Generates sharp, detailed images suitable for professional and commercial use. * **Creative Iteration Friendly:** Enables rapid visual variations for design exploration and A/B testing. * **Production-Ready API:** Designed for stable integration into creative tools and scalable workflows.