From Text to Image: Gen-4.5 First-Frame Storyboard Concept Video

This example demonstrates converting a text description into a first-frame image, then using that image as the starting point to drive Runway Gen-4.5 image-to-video generation of a motion shot. The author's pipeline takes only three types of input: the first-frame image, the motion and camera description, and the duration and aspect ratio. Therefore, this work splits "text to image" into two steps: first, generate a storyboard first frame with a clear composition and lighting from image material (16:9, single-person indoor medium shot, discernible window-light direction), then describe the dolly, focus shifts, and the amplitude of the character's movement in the prompt using cinematic language, letting the model extend the motion while preserving the first-frame composition. The duration uses the schema default of 5 seconds, and the aspect ratio stays 16:9 to match the first frame, avoiding center cropping that would disrupt the composition. It is suitable for film and television pre-production storyboard previews, concept exploration for advertising and brand shots, and workflows that need to define the image before defining the motion. Note that this model family still has known limitations regarding causal order and cross-frame object persistence; objects may be added or removed within a long shot in ways that deviate from expectations. In practice, it is recommended to validate the motion direction with a short duration first before extending it.