# Straighten, clean up and measure a scene

A few adjustments can make a capture much easier to explore. Twinbly's browser editor lets you level a tilted scene, calibrate its scale, take measurements, hide distracting regions and adjust its appearance.

## Start with the orientation

Open your capture in the editor and use **Level scene** to select three points on a flat surface, usually the floor or ground. Choose points spread across the same plane. Preview the result and save the orientation when it looks right.

This is useful for a room with a sloping horizon or a capture that opens at an awkward angle. Levelling one capture is different from [matching two captures together](/learn/combine-captures). It is also different from establishing accurate map coordinates.

## Set a known distance

Use the scene-scale tool to choose two points across something you know the size of, such as a doorway or countertop, and enter its real length. Use a reliable reference and place the points carefully.

Calibration gives the measurement tools a meaningful scale. Where a capture already has a scale, review it before relying on measurements; your own known-distance check is useful when the result matters.

## Measure a line or an area

Choose the line tool and place points to read a distance. Use the area tool to trace a closed boundary when you want an area measurement. Review the selected points and the displayed units.

Examples include estimating furniture clearance, explaining the size of a room, or outlining part of a site for a conversation. Measurements depend on the capture, scale and point selection. They are not automatically survey-grade or a substitute for an independent measurement when precision is required.

In flat orthographic views, familiar scale references such as a person or vehicle can also help communicate size. A silhouette is a visual aid; it does not validate the scene's scale.

## Hide distractions and focus attention

The **Eraser** hides a spherical region: select its center and edge around the unwanted part. This is non-destructive, so you can bring the region back. It is useful for a floating fragment or distracting capture clutter.

A **Viewing zone** bounds the useful area visitors should explore. **Zones** can clip away surrounding content or highlight one area by dimming the rest. Use a focused zone around a room, object or tour stop, and choose whether it applies to the whole scene or an individual supported layer.

These controls change presentation. Do not treat hidden geometry as deleted from every exported file or as secure redaction of private information. Check the actual output before distributing source assets.

## Adjust the appearance

Use color grading to adjust exposure, contrast, saturation, warmth and tint. A subtle adjustment can make a dark room easier to read or bring an outdoor capture closer to the mood you want to share.

Save the scene and check the published result. Whole-scene grading differs from the per-layer adjustments used to match several captures in a [combined scene](/learn/combine-captures).

## A useful preparation order

1. Open the capture and look for an obvious floor or ground plane.
2. Level the scene.
3. Check or calibrate its scale if you plan to measure.
4. Hide distracting regions and choose a useful viewing area.
5. Adjust the appearance and save.
6. Set an arrival view, add explanations, then review the published experience.

[Learn about marks and media](/learn/marks-and-media) · [Choose visitor movement](/learn/tours-and-navigation) · [Open your library](/dashboard/library)