> For the complete documentation index, see [llms.txt](https://docs.betterbuilding.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.betterbuilding.io/user-guide/2d-building/drawing/3d-view.md).

# 3D View

3D Views in the Building Assessment App provide a DXF preview of your model’s geometry, offering a detailed look at how your zones and surfaces are structured.

## View DXF

To view a DXF, head to the ‘3D View’ option in the results panel on the right. Click ‘Show in Large Viewer’ to open an interactive view where you can zoom in, examine surfaces, and toggle layers on or off. This makes it easier to check modelling assumptions and confirm accuracy.

<figure><img src="/files/T52YoYhqeA4BBADrfShL" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/jORFZh7sct4GprqOIzC6" alt=""><figcaption></figcaption></figure>

## Compare the DXF preview

To compare DXF previews of reference and proposed models, go to ‘Compare Geometry’ under the Simulation settings. This lets you visually review changes between design iterations, helping to spot issues or validate improvements.

<figure><img src="/files/jWpumiJf10zS4k6AQXYp" alt=""><figcaption></figcaption></figure>


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