What Is Selective Freeze Time?
Selective freeze time keeps a hero moving while the surrounding world is described as suspended in time. Two regions have to be explicit: a hero that can move, and surroundings that remain frozen.
A moving camera makes that separation harder to preserve through the shot. For a related freeze time Short, see Freeze Time.
Follow the Hero, Freeze the World
The directing principle is to give the hero’s movement, the camera route, and the frozen details their own instructions, rather than describing them as one general scene.
This Short compares two outputs. Model names are the labels used in the production files. In the Flow 2 output, the camera tracks through a market toward suspended oranges, but pedestrians also change while selected objects hang, so it is the weaker diagnostic example with more residual environmental motion.
In the Kling output, a chef advances and reaches beside suspended liquid and utensils, while the surrounding chefs appear comparatively stable. It is the stronger selective-freeze interpretation of the two, but neither output is perfectly or mathematically frozen, and residual human and background motion remains a question for human review.
Example Directing Pattern for Selective Freeze Time
This is an example directing pattern, not the exact production prompt.
[Hero] moves in natural, real-time motion: [specific action].
Camera route: [how the camera follows the hero, such as tracking alongside or approaching].
Frozen details: [named objects and people held in suspension, such as droplets in mid-air or bystanders mid-stride].
Everything not named as moving stays suspended for the whole shot.Naming the frozen details gives you specific things to check afterwards.
Quality Checks for Selective Freeze Time Generations
- Whole-Shot Check: Inspect the background people and objects throughout the generation. One striking suspended object does not settle the question.
- Hero Versus World: Confirm that the hero is the intended source of the motion and that the named frozen details stay suspended around it.
- Camera Route: A moving camera makes the separation harder to preserve, so watch the frozen details at the end of the route as well as the start.
Part of the AI Cinematic Effects playlist.
