Pre-visualization (Previz)

What is Pre-visualization (Previz)?

Previz is the process of creating rough moving sequences that show how a scene will be shot and edited before any real filming or final generation happens.

At a glance

Also known as
PrevizPre-visAnimaticsTechnical previzVirtual production previz
Used for
Planning complex shot sequencesCommunicating visual intentions to crewResolving VFX and camera staging earlyIterating on AI-generated shot compositions
Common tools
FrameForgeUnreal engineBlenderShotProRunwayMorphicMidjourney
Related terms
Pre-productionStoryboardAnimaticVirtual productionVFXShot listMood board

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How it compares

How it compares

Pre-visualization (Previz)Storyboard

A storyboard communicates planned shots through static drawn panels, showing key frames of a sequence. Previz produces moving sequences that simulate the full timing, camera movement, and editing of planned shots. Storyboards are faster and cheaper to produce; previz provides a far more accurate representation of how a sequence will feel in motion.

Think of it like…

Previz is like a rehearsal for a complex stage performance: the staging, blocking, and timing are worked out in a rough run-through before the full production is mounted. Just as rehearsals prevent costly mistakes on opening night, previz prevents expensive reshoots and VFX re-work by resolving problems before production resources are deployed.

Pro tip

In AI filmmaking, use low-cost image generation to produce rapid previz sequences before committing to expensive video generation passes: even a series of AI-generated still frames at the intended framing and style will dramatically improve your editorial planning and reduce wasted generation budget.

Types and variations

  • Previz exists at multiple fidelity levels and serves different purposes at each.
  • Rough blocking previz uses simple geometry and placeholder assets to establish timing and staging quickly.
  • Standard previz uses more detailed models and accurate camera simulations to show the director and crew what each shot will look like.
  • Technical previz addresses the precise logistics of specific shots: cranes, rigs, wire work, or complex multi-element compositions: often in collaboration with stunts and VFX departments.
  • Virtual production previsualization, developed in tandem with LED volume and real-time rendering workflows, integrates previz directly into the production environment.
  • AI-generated previz uses generative image and video models to rapidly produce rough visual representations of planned shots from prompts or sketches.

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Common use cases

  • Previz is most commonly applied in productions where sequences are too complex, dangerous, or expensive to shoot without detailed advance planning.
  • Action sequences, large-scale VFX shots, underwater or aerial work, complex single-take sequences, and virtual production shoots all benefit from previz.
  • In AI filmmaking, previz is increasingly used to plan the shot composition and pacing of AI-generated sequences before final generation, reducing the number of costly high-quality generation passes needed and ensuring that the overall edit works before individual shots are finalised.
  • It is also used as a communication tool, allowing directors to convey specific visual intentions to clients or collaborators who struggle to interpret written descriptions or static storyboards.

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FAQs

What is the difference between previz and an animatic?
An animatic is typically a timed sequence of storyboard panels cut together with a rough audio track, used to check editorial pacing. Previz goes further, producing rough animated sequences that simulate camera movement, character performance, and staging in three dimensions. Animatics are simpler; previz is more spatially accurate.
When in production does previz typically happen?
Previz is a pre-production activity, typically produced after a script has been approved and key creative decisions ( director, production designer, VFX supervisor ) have been made. It often runs concurrently with other pre-production work such as location scouting, casting, and design development.
What software is used for previz?
Common previz tools include FrameForge, Unreal Engine with cinematics tools, Blender, ShotPro, and proprietary studio systems. In AI filmmaking, generative image and video tools such as Midjourney, Runway, and Morphic are increasingly used for rapid, prompt-driven previz.
Can AI tools replace traditional previz?
For many productions, AI-generated previz offers a faster and cheaper alternative to 3D previz for shot composition and editorial planning. However, for complex spatial staging, stunt coordination, or VFX planning that requires precise 3D geometry, traditional 3D previz remains more technically accurate.
Who produces previz in a film production?
Previz is produced by specialised previz artists and studios, who work closely with the director, VFX supervisor, and cinematographer. On smaller productions, previz may be produced by the director themselves using consumer 3D tools or AI generation platforms.
How does previz benefit the VFX production process?
Previz allows VFX supervisors to plan the technical requirements of each effects shot in advance, identifying which elements need to be photographed practically, which will be computer-generated, and how they will be composited. This detailed planning reduces surprise costs and technical problems during the actual VFX production phase.
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