Build Runway Gen-3 prompts that move the way you want
Runway Gen-3 Alpha has some of the most controllable camera behaviour of any text-to-video model — but only if you name the motion in terms it understands. Vague prompts drift; a clear “slow dolly in on the subject, handheld” gives you the shot you pictured. This builder assembles your subject, environment, camera motion and mood into the sentence order Runway recommends, and gives you a ready-made motion vocabulary.
How the builder structures a Gen-3 prompt
Runway’s own guidance is to keep prompts descriptive and ordered:
- Subject + action — who or what, and what they are doing.
- Environment — the setting, with one or two grounding details.
- Camera motion — the cinematography move (this is Gen-3’s strength).
- Mood / lighting — the emotional and tonal register.
- Visual reference style — film stock, era, or artistic look.
The builder writes these as flowing prose rather than tags, because Gen-3 parses natural sentences more reliably than keyword lists.
Motion vocabulary and tips
Useful camera-motion terms Gen-3 understands well:
- Dolly in / out — move the camera toward or away from the subject.
- Pan left / right — rotate horizontally from a fixed point.
- Tilt up / down — rotate vertically.
- Crane / boom up — lift the camera while keeping the subject framed.
- Tracking / follow — move alongside a moving subject.
- Static — locked-off, no camera movement.
Tips:
- One dominant motion. Combining several camera moves makes Gen-3 hesitate.
- Match mood to lighting. “Tense” pairs naturally with low-key lighting.
- For image-to-video, lead with motion since the visual is already set.
- Iterate on the verb. Swapping “walking” for “sprinting” changes the whole energy of the clip.