Motion Control Rig
What is Motion Control Rig?
A motion control rig is a robotic camera system that can repeat exactly the same camera move over and over, allowing filmmakers to combine footage of different elements into a single, perfectly matched composite.
At a glance
- Also known as
- Moco rigMotion control cameraRobotic camera system
- Used for
- Repeatable camera moves for VFX compositingProduct photography with consistent motionMiniature and model filmingStop-motion animationAI reference plate capture
- Common tools
- Mark roberts motion control (MRMC)Kuper controlsBolt high-speed robot armFlair motion control software
- Related terms
- Camera solveCamera dollyStop motionVisual effectsCamera sliderMovi
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How it compares
A camera dolly is operated by a skilled human dolly grip and produces smooth but inherently variable movement that cannot be precisely replicated between takes. A motion control rig is computer-operated and can execute the same move to sub-millimetre accuracy repeatedly, making it essential for any multi-pass filming where different elements must be perfectly aligned in post-production. Dollies are chosen for organic, human-feeling movement; motion control rigs are chosen for technical precision and repeatability.
Think of it like…
A motion control rig is like a CNC machine in manufacturing: where a skilled machinist might cut a near-perfect part each time, the CNC machine executes the same programme to the same tolerances every single time without variation, allowing components to be produced that must fit together with absolute precision.
Pro tip
When using a motion control rig to capture plates for AI compositing, programme a short pre-roll and post-roll into the move: allowing the rig to reach full speed before the 'record' portion begins and decelerate after: to ensure the in-use portion of the move is free from acceleration artefacts that could complicate the camera solve.
Types and variations
- Traditional multi-axis moco rigs are large, purpose-built systems used on film sets and in specialised facilities, capable of precise, slow or high-speed moves along many programmed axes.
- High-speed robotic arms ( such as the Bolt system ) are adapted from industrial robotics and can execute extremely fast, acrobatic camera moves at speeds far beyond human capability, enabling dramatic slow-motion footage of fast events.
- Smaller, more affordable motion control systems such as the Rhino Arc or Edelkrone's motion control modules bring programmable repeatability to independent filmmakers.
- In CGI and virtual production, the concept of motion control is implemented entirely in software, where virtual cameras can be keyframed with perfect precision.
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Try MorphicCommon use cases
- Motion control rigs are used in visual effects production to capture multiple passes of a scene or model from exactly the same camera path, enabling the elements to be composited in post-production.
- In commercial and product photography and videography, they produce the elegant, repeatable sweeping moves seen in automotive and technology advertising.
- In stop-motion animation, moco rigs advance the camera incrementally between frames to produce smooth camera movement.
- In virtual production, the data output by a motion control rig can drive real-time LED wall content, maintaining correct perspective alignment as the camera moves.
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