# Hollow Shapes & How to use Reconstruction

**URL:** <https://shapeworks.discourse.group/t/hollow-shapes-how-to-use-reconstruction/401>\
**Category:** Uncategorized\
**Created:** [March 19, 2026, 10:04pm UTC](https://shapeworks.discourse.group/t/hollow-shapes-how-to-use-reconstruction/401 "2026-03-19T22:04:09Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Alexander](https://avatars.discourse-cdn.com/v4/letter/a/bc8723/32.png) [@Alexander](https://shapeworks.discourse.group/u/Alexander)\
**Post date:** [March 19, 2026, 10:04pm UTC](https://shapeworks.discourse.group/t/hollow-shapes-how-to-use-reconstruction/401/1 "2026-03-19T22:04:09Z")

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Hi - I am a new ShapeWorks user and I am aiming to optimize & analyze images of tibiae, and hopefully use this to reconstruct some images as well.

Is working with an entire 3D model of a hollow bone (like a tibia) an issue? Is it better to perform separate analyses on the outer and inner surfaces?

The Surface Reconstruction tool - I am struggling to understand how to use it. Hoping for some help or a resource to guide me through it.

I appreciate any help! Thanks

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**Author:** ![amorris](https://avatars.discourse-cdn.com/v4/letter/a/73ab20/32.png) [@amorris](https://shapeworks.discourse.group/u/amorris)\
**Post date:** [March 25, 2026, 4:38pm UTC](https://shapeworks.discourse.group/t/hollow-shapes-how-to-use-reconstruction/401/2 "2026-03-25T16:38:48Z")

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Does your shape have inner and outer surfaces? Are you hoping to model the inner and outer surfaces together? This is possible and I believe has been done my a group before with ShapeWorks. You would need to extract the two surfaces as separate mesh files and use multi-domain optimization.