Keep the stationary face visible in a mechanical seal film
Commission a seal explanation around the interface between rotating and stationary parts rather than showing the complete assembly turning as one object.
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Production guides — page 21
Practical questions, planning tools and source-informed guides for commissioning and using video.
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Keep the source position visible in a retroreflection explanation
Explain a retroreflector through its source-return relationship rather than treating it as an ordinary mirror.
Read the guideKeep the small-angle assumption visible in a pendulum explainer
Avoid pairing a dramatic wide swing with a period relationship that was introduced for a small-angle idealisation.
Read the guideKeep the sleeper in the picture when explaining ballast
Commission a railway film that shows ballast as part of the track support assembly rather than an isolated bed of decorative stone.
Read the guideKeep the sampling note attached to a video performance comparison
Retain the sampling status of a report when deciding whether a small performance difference justifies a new video edit.
Read the guideKeep the same name for the same destination throughout an orientation film
Preserve exact destination labels when stylistic synonyms could make one place appear to be several places.
Read the guideKeep the relay coil path separate from the switched contact path
Explain an electromagnetic relay through magnetic actuation and a separate contact circuit rather than one continuous current arrow.
Read the guideKeep the project film usable without requiring device rotation
Commission portrait and landscape viewing routes that respect how a visitor holds or mounts their device instead of forcing rotation to reach the film.
Read the guideKeep the podcast host voice distinct from the voice of the company
Define when a host is guiding the conversation and when they are making an authorised organisational statement.
Read the guideKeep the pattern distinct from the casting it helps produce
Brief a tooling explanation that treats a casting pattern as a manufacturing representation rather than an exact finished product replica.
Read the guideKeep the pantograph contact strip in the overhead power story
Brief an electric-rail sequence that shows the moving contact interface rather than treating the overhead support structure as the point where the train receives power.
Read the guideKeep the original sheet visible in a thermoforming story
Brief a thermoforming sequence that distinguishes reshaping a sheet from injecting material and shows where the final trim defines the product.
Read the guideKeep the observer movement visible when explaining parallax
Commission a parallax explanation in which apparent object displacement can be traced to a changed viewing position.
Read the guideKeep the mechanical input in a generator explanation
Choose an energy-conversion sequence that keeps the generator distinct from the engine or turbine supplying its mechanical input.
Read the guideKeep the measure type and unit with a model property value
Commission an information graphic that preserves a property value meaning rather than displaying an isolated number copied from a model.
Read the guideKeep the lock chamber fixed while its water level changes
Commission a canal-lock explanation that shows a vessel changing elevation with chamber water rather than riding on an invented mechanical lift platform.
Read the guideKeep the interlayer visible when explaining laminated glass
Commission a laminated glass sequence that shows bonded sheets and interlayer rather than representing an empty insulating cavity.
Read the guideKeep the inside and outside of a river bend fixed through a meander explanation
Choose a plan-view treatment that preserves cut-bank and point-bar relationships when the camera changes direction.
Read the guideKeep the hardness scale attached to the number
Choose a hardness result treatment that preserves the named scale and its indentation context instead of inventing a universal hardness scoreboard.
Read the guideKeep the excavation outline separate from the tunnel lining
Commission a tunnel cross-section that distinguishes the excavated space, initial support and permanent lining for the documented method.
Read the guideKeep the dispersed liquid visible in an emulsion explanation
Approve an emulsion cutaway that retains liquid droplets and identifies the surrounding liquid rather than making both disappear into a uniform colour.
Read the guideKeep the deformation and electrical signal distinct in a load cell film
Brief a strain gauge load cell explanation that connects deformation to signal while making any visual exaggeration explicit.
Read the guideKeep the customer logo from making a broader endorsement than the quote
Review how logo placement titles and surrounding imagery affect the apparent scope of a customer endorsement
Read the guideKeep the counterweight in a traction lift explanation
Use a checked shaft diagram to show the paired movement of a traction lift car and counterweight without seeking hazardous machinery footage.
Read the guideKeep the conversion window unchanged when comparing two video campaigns
Check the time allowed for attributed actions before comparing results from different video campaigns or creative versions.
Read the guideKeep the contaminated fraction visible after a soil washing sequence
Explain soil washing as separation and transfer without implying that all contamination disappears with a rinse.
Read the guideKeep the conditions in a customer recommendation
Preserve the conditions that make a customer recommendation useful instead of trimming it into a universal endorsement
Read the guideKeep the boundary layer attached to the surface concept rather than painting the whole air stream
Scope an aerodynamic inset around near-surface velocity variation.
Read the guideKeep the biological layer visible in an attached growth treatment film
Explain the role of attached microorganisms without making a trickling filter look like a passive particle screen.
Read the guideKeep the adjacent air space visible in a reflective insulation explanation
Choose a section and graphic treatment that explains reflective insulation as a radiant relationship rather than the thickness of a shiny sheet.
Read the guideKeep specimen size in the picture when moving from force to stress
Choose a tensile test graphic that distinguishes the force applied to a specimen from stress related to its original cross sectional area.
Read the guideKeep specimen direction attached to composite test results
Commission a composite material explanation that retains fibre and specimen orientation rather than presenting one directional test as a universal property.
Read the guideKeep source frequency and received frequency separate in a Doppler animation
Commission a moving-source sound explanation without making the emitter change its own tone to create the observed shift.
Read the guideKeep separate objects visually separate when their relationship matters
Review alignments and overlaps that can make unrelated physical elements appear connected in a project image.
Read the guideKeep screen direction readable when a film follows material flow
Plan the visible direction of travel so viewers can follow a material journey without mistaking a camera reversal for a return trip.
Read the guideKeep saturated brand colours usable in a smaller colour gamut
Commission a test for highly saturated graphics and filmed colours when a film moves into a narrower output colour space.
Read the guideKeep sample counts separate from the bytes used to represent them
Commission a measurement-data explanation that distinguishes the number of values from their storage representation.
Read the guideKeep ride roughness separate from skid resistance in a road film
Commission different evidence and imagery for pavement evenness and tyre surface friction rather than treating a smooth camera move as proof of both.
Read the guideKeep return flows visible when a diagram reports movement
Choose whether a flow graphic reports gross movements or a net balance and avoid erasing meaningful return paths through visual simplification.
Read the guideKeep return biomass distinct from the final solids outlet
Explain the return loop in activated sludge without making it look like repeated discharge or an accidental backflow.
Read the guideKeep repeated chart panels on comparable scales
Use consistent axis ranges across repeated panels when viewers are expected to compare magnitudes between sites or categories.
Read the guideKeep render previews from quietly determining master quality
Decide whether existing timeline preview renders are suitable for reuse in the final export, using their actual settings and a representative comparison.
Read the guideKeep remembered state visible after the initiating signal disappears
Explain a retained logical state without making it look like a continuously held input.
Read the guideKeep reflected space distinct from physical space in a project film
Choose views of mirrors and reflective glazing that let viewers distinguish the actual room from its reflected continuation.
Read the guideKeep pre-sampling filtering on the correct side of the converter
Commission a signal-chain animation that does not portray later digital cleanup as equivalent to analogue anti-alias filtering.
Read the guideKeep power factor separate from a percentage efficiency claim
Choose labels and comparison graphics that identify real and apparent power when power factor is discussed rather than converting it into equipment efficiency.
Read the guideKeep podcast chart recognition separate from proof of the episodes business value
Describe a chart appearance accurately without using it as a substitute for the programme objective.
Read the guideKeep perceived pitch separate from a missing fundamental component in a sound graphic
Do not restore an absent spectral bar simply because a listener can still perceive the related pitch.
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