# Export CT-AAA2 from 3d Slicer

**URL:** <https://discourse.slicer.org/t/export-ct-aaa2-from-3d-slicer/2757>\
**Category:** Support\
**Tags:** file-export\
**Created:** [May 3, 2018, 7:56pm UTC](https://discourse.slicer.org/t/export-ct-aaa2-from-3d-slicer/2757 "2018-05-03T19:56:45Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [May 4, 2018, 1:33am UTC](https://discourse.slicer.org/t/export-ct-aaa2-from-3d-slicer/2757/3 "2018-05-04T01:33:06Z")

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Note that what you visualize with volume rendering may appear as a surface when viewed on a 2D screen, but it is actually a surface-like rendering of a semi-transparent point cloud, and therefore it cannot be “saved” as a surface mesh. You must segment it if you need it as .obj or .stl, as Steve described above. See this post for more detailed explanation: [Save volume rendering as STL file](https://discourse.slicer.org/t/save-volume-rendering-as-stl-file/524).

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