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29 lines
1.6 KiB
Markdown
29 lines
1.6 KiB
Markdown
# 3D previews
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Check what a file actually is before you slice it. Every model page has an interactive 3D viewer that runs in your
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browser, so there's nothing to install.
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- **Formats:** STL, 3MF, OBJ and STEP. LightBurn projects get a picture of their design.
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- **Multi-plate 3MF projects** show a thumbnail for every plate, with how many objects each one holds.
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- **Model colour:** pick the colour the preview is shown in.
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- **Photos** sit in their own gallery, separate from the printable files.
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## Card thumbnails
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Model cards in the library show a small 3D thumbnail. A sliced 3MF's own thumbnail is used when it has one. For other
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files, admins choose under **Administration → Rendering** how missing thumbnails are made:
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- **Automatic:** rendered in the browser as a card scrolls into view, then saved for everyone.
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- **On demand:** a card shows a **Generate preview** button instead.
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- **Disabled:** cards show a placeholder. The full viewer still works when the model is opened.
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## Very detailed models
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Models with more than a million triangles can be slow to download and rotate, especially on phones and older
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computers. With **Simplify previews** on, under **Administration → Rendering**, their preview is reduced to about a
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million triangles, keeping the shape to within 1% of the model's size. Only the preview changes: model files, downloads
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and anything sent to a slicer are never touched.
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The first preview of a very large model can take a minute to prepare, and uses the most memory on the server. If
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previews fail, check memory in [System Health](../guides/system-health.md).
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