Riverflow 2.5 Fast is Sourceful's speed-optimized agentic image model on Scenario. Tuned for production marketing and design, it renders crisp on-image typography, supports custom font URLs (TTF/OTF/WOFF), and outputs at up to 2K across 11 aspect ratios. Pass up to 4 reference images for image-to-image, toggle transparent or solid backgrounds, and tune thinking level (low/medium/high) for the speed-quality trade. Built for packaging mockups, ad banners, social marketing, packshots, and design exploration at iteration speed.