# Issues with Reconstruction

**URL:** <https://shapeworks.discourse.group/t/issues-with-reconstruction/383>\
**Category:** Uncategorized\
**Created:** [October 21, 2025, 1:47am UTC](https://shapeworks.discourse.group/t/issues-with-reconstruction/383 "2025-10-21T01:47:27Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![anj030](https://avatars.discourse-cdn.com/v4/letter/a/ea5d25/32.png) [@anj030](https://shapeworks.discourse.group/u/anj030)\
**Post date:** [October 21, 2025, 1:47am UTC](https://shapeworks.discourse.group/t/issues-with-reconstruction/383/1 "2025-10-21T01:47:27Z")

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I have microCTs in STL files that I import into Shapeworks and have used different optimization parameters, but get similar results where it looks like it has issues with reconstruction of one or more distal femurs. Can I get some feedback on where i can tweak the parameters, if this issue is something in grooming potentially, etc.

 ![Screenshot 2025-10-17 at 1.43.33 PM](https://global.discourse-cdn.com/free1/uploads/shapeworks/original/1X/4fa7077a5a04ffde0828596cf1404c2473f74298.png)

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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:** [October 22, 2025, 6:10pm UTC](https://shapeworks.discourse.group/t/issues-with-reconstruction/383/2 "2025-10-22T18:10:22Z")

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This is usually the consequence of the particles being out of order across the shapes. I would start with a lower number of particles, 64 for example and increase the number of iterations per split. See if that gives reasonable basic shapes to start.

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**Author:** ![anj030](https://avatars.discourse-cdn.com/v4/letter/a/ea5d25/32.png) [@anj030](https://shapeworks.discourse.group/u/anj030)\
**Post date:** [October 23, 2025, 4:28am UTC](https://shapeworks.discourse.group/t/issues-with-reconstruction/383/3 "2025-10-23T04:28:17Z")

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Thanks for the feedback! I lowered the particle numbers to 128 since 64 didn’t spread and cover the model. My number of iterations is at 10000 (at least for these two models here) and I still have a similar issue with what looks like the particles being out of order. I also have normals on. I’m unsure as to why one model reconstructs well (whether I do two models, 4 models, etc.) and the others look similar to the model on the right.

 ![Screenshot 2025-10-22 at 9.26.30 PM](https://global.discourse-cdn.com/free1/uploads/shapeworks/original/1X/4d69c9ee09564fb92616477227b83108d151a80a.png)