# From spline to surface

**URL:** <https://discourse.shapr3d.com/t/from-spline-to-surface/9047>\
**Category:** Modeling Questions\
**Created:** [September 18, 2020, 6:05pm UTC](https://discourse.shapr3d.com/t/from-spline-to-surface/9047 "2020-09-18T18:05:13Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![thepian](https://avatars.discourse-cdn.com/v4/letter/t/b5ac83/32.png) [@thepian](https://discourse.shapr3d.com/u/thepian)\
**Post date:** [September 18, 2020, 6:05pm UTC](https://discourse.shapr3d.com/t/from-spline-to-surface/9047/1 "2020-09-18T18:05:13Z")

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I’m trying to create an irregular circle and turn it into a printable object. So that,

- It is round but not circular
- It isn’t a disc, but an actual circle of around 1mm thickness

Do you create two odd discs on extruding the other, or is there a way to turn the gap between to circles into a surface?

Is there a tutorial on how to mirror a spline to create a surface?

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**Author:** ![penguin3d](https://avatars.discourse-cdn.com/v4/letter/p/4af34b/32.png) [@penguin3d](https://discourse.shapr3d.com/u/penguin3d)\
**Post date:** [September 18, 2020, 8:29pm UTC](https://discourse.shapr3d.com/t/from-spline-to-surface/9047/2 "2020-09-18T20:29:43Z")

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I think you might want to look at the loft tool. Not sure, but it sounds like what you want.

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**Author:** ![Gelphyn](https://avatars.discourse-cdn.com/v4/letter/g/db5fbb/32.png) [@Gelphyn](https://discourse.shapr3d.com/u/Gelphyn)\
**Post date:** [September 19, 2020, 3:31am UTC](https://discourse.shapr3d.com/t/from-spline-to-surface/9047/3 "2020-09-19T03:31:43Z")

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Hi @thepian Welcome to the Forum.  
In this Clip A Spline is turned into a 1mm thick disk simply by Extrusion.

[https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/f/f7fe19953807e97fb2e974cae8acb218fccbec5d.mp4](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/f/f7fe19953807e97fb2e974cae8acb218fccbec5d.mp4)

As @penguin3d advised it could be created by Lofting, and this allows variations on the Extrusion method:

[/404](https://discourse.shapr3d.com/404)

What ever Shape is used it MUST be a **Closed Shape** , i.e., displaying a Light Blue fill.

If you need any more help just shout.

Happy S3Ding.