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Model guide
Published Aug 1, 2026
6 min read
Wan Video API Composition Guide for Layered Complex Scenes
Separate subjects, relationships, space, action, and camera to reduce ambiguity in complex video prompts.
Key takeawayComplex composition usually improves through input structure, not more adjectives.
Why this deserves its own decision
Scenes with multiple people, objects, and depth layers often fail relationally: positions swap, foreground and background merge, or an action targets the wrong object. Long prose prompts make it easy for a model to capture only fragments.
Decision framework
- List subjects and immutable traits before describing their relationships.
- Define foreground, midground, background, and allowed motion in each layer.
- Keep one primary action and one primary camera move per shot.
Putting it into a ModelRush workflow
Store the layered shot brief as a ModelRush prompt template and version references separately from character cards. Draft complex composition on a value route, then move to quality after spatial relationships are approved. Classify failures as identity, space, or action.
What to measure after launch
- Correctness of subject relationships and depth placement.
- Full reruns caused by composition errors.
- Attempts saved by drafting before quality generation.
Complex composition usually improves through input structure, not more adjectives.
Next steps
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