Runway has launched Gen-4, its most advanced reference-based image generation tool to date. This new model allows users to upload up to three reference images, facilitating the creation of consistent characters and environments across various scenes. The Smart Tagging System enables users to assign custom tags like @woman or @building to reference images, which can be seamlessly integrated into prompts for precise control over generated content. Gen-4 offers professional-quality outputs with resolutions of 720p (1 credit) and 1080p (2 credits), catering to diverse creative needs. The interactive workflow allows users to click on thumbnails or tags to instantly add them to prompts, streamlining the design process. Additionally, the iterative design feature enables generated images to be used as new references with a single click, enhancing creative flexibility. This tool is particularly beneficial for maintaining character consistency across multiple scenes, exploring architectural variations, executing style transfers with precision, and composing complex scenes. To achieve optimal results, it's recommended to use reference images with natural, even lighting and neutral expressions. Gen-4's capabilities are accessible via Runway's web platform and API, allowing integration into various applications and workflows. This advancement marks a significant step forward in AI-driven image generation, offering creators unprecedented control and quality in their projects.