A building model can contain the shape of a luminaire, a digital light source, both or neither. When that model enters a visualisation workflow, ask how the visible fitting and the light it contributes are being reconciled. A convincing night scene should not depend on accidental duplication or an imported object that only looks illuminated.
This is a scene-conversion question, not a lighting-design recommendation. The qualified project team remains responsible for any actual luminaire selection, illumination assessment or operating requirement.
Inventory what arrived
Ask the specialist to distinguish visible luminaire geometry from the scene objects or materials used to produce light. The buyer does not need every internal setting, but should understand whether the source provided a complete relationship or only a shape with a name.
Epic's import guidance explains that some source lights are approximated by different engine light types. A translated light is not necessarily an identical implementation.
Where a source light cannot be carried across directly, ask what replacement treatment is proposed and which approved reference guides it. Do not make the visual artist responsible for inventing a design distribution simply to fill a dark area.
Test one fitting before repeating the treatment
Choose a representative scene region containing a visible fitting and the surfaces it is meant to illuminate. Inspect it with the relevant scene contribution isolated, then within the full visual context. The purpose is to understand the digital relationship, not to measure the completed building from a render.
Look for a fitting that appears to glow while contributing no intended light, or a separate light that remains active after its visible fitting is hidden. Also ask whether overlapping representations are contributing more than intended. These are model-state and conversion issues that can survive a purely aesthetic review.
If the scene contains many repeated luminaires, settle the representative treatment before applying it across the model. Keep exceptions identifiable where the source specifies different fixtures or operating states.
A hypothetical corridor conversion
Imagine a contractor supplies a corridor model with ceiling fittings and an associated lighting setup. In the receiving visual scene, the fitting geometry remains, while a replacement light source is added during preparation. An older scene light is also still active.
The preview looks brighter than expected. Instead of simply lowering the entire scene, the specialist traces the contributions and removes the unintended duplication. The buyer then reviews the intended representation with the subject owner. This invented example describes digital scene housekeeping, not a diagnosis of any real building's lighting.
Record the operating state separately
Once the conversion is understood, identify which fittings are on, off or outside the selected scene. A night view can otherwise combine source defaults with later artistic choices that nobody has reviewed as one state.
If a technical lighting explanation is required, obtain the responsible specialist's approved content and distinguish it from the visual treatment. The fact that a rendered fitting illuminates a surface does not verify its installed performance, energy use or suitability.
Ask for the scene-light relationship to remain traceable through later model updates. A new import should not silently restore obsolete light objects while preserving their replacements. Discuss the intended modelled scene with Live Images and confirm the specialist conversion and review scope rather than assuming that importing luminaire geometry completes the work.
Prepared with AI assistance for Live Images. Planning guidance is general; suitability and production scope must be agreed for your project.