The one thing you genuinely cannot prompt your way to in AI video is handheld camera motion. The specific drift, the realistic shake, the way a human operator walks around a scene, you can describe it all day and the model will not feel it. You need to hand it a real camera move as a reference. Everyone does that in Blender. I hate Blender.



So I skipped it and used my iPhone. ARKit tracks camera motion in 3D space scarily well, so you can literally walk around a blocked-out scene holding your phone and record a complex move exactly like a real operator would, shake and all. There is an open-source SwiftUI tool for this, film-space by maxprokopp, an AR camera and scene recorder, and he built it with Claude and put it out for anyone to use.



The flow is simple: set up the scene in 3D space on the phone, record the camera move by physically walking it, generate a start frame with the positions and characters, then feed the start frame plus the recorded motion into Seedance. Seedance fills in the scene and inherits that real handheld feel off the iPhone track.



No 3D software, no rig, just walking around a room with a phone like a camera operator. The gritty human motion that used to be the hardest thing to fake is now the easiest part.

The open-source AR camera/scene recorder I used is maxprokopp/film-space (SwiftUI, built with Claude, he put it up for anyone to build on): [https://github.com/maxprokopp/film-space](https://github.com/maxprokopp/film-space)



The video step runs on an OpenAI-compatible key so the start frame + recorded camera motion go straight into [Seedance](https://www.atlascloud.ai/models/bytedance/seedance-2.0/text-to-video?utm_source=reddit&utm_medium=comment&utm_campaign=r_comfyui&utm_term=iphone-arkit-previz).

I hate Blender, so I used my iPhone to record the camera move instead, then fed it to Seedance