The hardest part of AI video isn't resolution or lighting... it's physics.
We've all seen generation after generation of models struggle with basic interactions. A character walks, but their feet slide. Someone picks up a cup, and their hand merges with the ceramic. It’s been the standard limitation of the technology.
ByteDance just announced Seedance 2.0, and they're claiming to have solved the "interaction" problem.
Seedance 2.0 is focused entirely on making complex motion workable. Instead of just generating a pretty frame, it seems to understand physical laws. This means characters can actually interact with objects, run, and move without the dreaded "liquid limb" effect.
The "Everything Sink" Input
The workflow for Seedance 2.0 is what makes it interesting for pro users. It moves away from simple text prompting into a full multimodal directed approach.
You can input a massive amount of context to guide the model:
- 9 reference images
- 3 video clips
- 3 audio clips
- Natural language instructions
It uses a unified multimodal audio-video architecture to process all this at once. Instead of asking the model to hallucinate a scene from text, you're giving it exact assets for composition, camera movement, and visual effects. It’s less "generate this" and more "animate these assets."
Physics That Don't Break
Here is the thing that actually matters for pro work: Complex Scenarios.
ByteDance claims SOTA levels in "generation usability." In plain English: the model respects physical laws better than previous iterations. Multi-subject interactions are supposedly stable.
If you want to make a short film where two people interact physically (like a handshake or a fight scene), this models promises to keep their geometry consistent.
15 Seconds of "Pro" Control
15 seconds is a huge step up for consistent generation. Seedance 2.0 outputs 15-second high-quality multi-shot clips with dual-channel audio.
The "Director-level Control" features are designed to let you edit and extend videos without the style drifting. You can command the entire video creation process, making it a viable tool for actual production workflows rather than just experimental clips.
How to use it
ByteDance is currently rolling this out across its ecosystem at Dreamina, but you can also try it at ChatCut (We have an invite code if you would like one.)