Riverflow V2 Max Preview is the most powerful variant of Sourceful's Riverflow V2 preview lineup, exceeding the performance of the Riverflow 1 family. As Sourceful's first unified text-to-image and image-to-image model family, it supports high-resolution outputs up to 4K with wide aspect ratios including 21:9, and leverages a vision-language reasoning loop for refined, multi-step generation and editing.