What is multi-image fusion in AI image and video generation?

Multi-image fusion is the technique of feeding multiple reference images — separate characters, props, and environment shots — into an AI model at once, so it generates one cohesive scene that preserves each subject's identity, scale, and lighting. In Seedream 5.0 Pro on invideo, you select three or more source images as cards and fuse them into a single generated scene.

Multi-image fusion works by anchoring every element of a scene to its own visual reference instead of describing it in text. In a standard single-reference generation, you give the model one image and a prompt has to carry everything else — the second character, the setting, the props — which is where identity drift creeps in. With fusion, each element arrives as its own image: the model reads the identity from each reference and composes them into one output with consistent lighting and scale across all of them.

In practice, the workflow inside invideo is direct: open Seedream 5.0 Pro, select your source images as cards in the interface — for example, two characters photographed separately plus a background element — and the model fuses them into a single cohesive scene with both characters placed inside that environment. Seedream 5.0 Pro supports three or more separate source images per fusion, so a product shot, a model, and a location can all be locked visually rather than left to prompt interpretation. This is why product and ad creators use it: the exact product stays visually consistent while the scene around it changes.

The same principle extends to video generation. Seedream 5.0 Pro generates hyper-realistic, cinematically styled clips natively inside invideo, and fused subjects have to hold their identity as the frame moves — which is where the model's rendering quality matters. It captures micro-detail like freckles on a face and the fine surface texture of a baby's hand, and its cinematic lighting handles high-contrast, directional shadow work on human faces, so subjects composed from separate references still read as one coherently lit scene rather than a composite. After fusing, Seedream 5.0 Pro's precision editing lets you restyle the resulting scene — wall colors, furniture, environment details — without leaving invideo.

One practical note for anyone fusing at volume: the bottleneck isn't generation speed, it's keeping track of which references and directions you gave the model several scenes ago. Loading your character sheets and creative direction into the invideo agent once — it holds that context persistently across a session — keeps every fused scene pulling from the same source material without rebriefing.

Realism, cinematic lighting, precise skin textures, lens understanding, precision editing, and multi-image fusion. All of it, natively inside invideo.

— invideo's creative team