# Offset constraints not updating properly

**URL:** <https://discourse.shapr3d.com/t/offset-constraints-not-updating-properly/39080>\
**Category:** Modeling Questions\
**Created:** [August 10, 2025, 3:44pm UTC](https://discourse.shapr3d.com/t/offset-constraints-not-updating-properly/39080 "2025-08-10T15:44:23Z")\
**Posts on this page:** 11\
**Page:** 1

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**Author:** ![Genesis](https://avatars.discourse-cdn.com/v4/letter/g/96bed5/32.png) [@Genesis](https://discourse.shapr3d.com/u/Genesis)\
**Post date:** [August 10, 2025, 3:44pm UTC](https://discourse.shapr3d.com/t/offset-constraints-not-updating-properly/39080/1 "2025-08-10T15:44:23Z")

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Hello!

I am trying to design an object that slide over another one with a low tolerance.

For this, I took the face of the initial object, projected it onto a new plane and then offset it by the desired amount.

Now comes the issue: When adjusting the initial objects size, whose projected face I used to create the offset, the offset does not update!

Before changing the size of the object:

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/a/6/a633f8bd16e0a67acbdb9ca89d53a76ea48035b4.jpeg)

After changing the size of the object:

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/6/6/66b659c274a5b9778a712751eb70f3dc805cd282.jpeg)

Does anyone have an idea on how to sort out this issue?

Kind regards

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<div class="post-metadata">

**Author:** ![Genesis](https://avatars.discourse-cdn.com/v4/letter/g/96bed5/32.png) [@Genesis](https://discourse.shapr3d.com/u/Genesis)\
**Post date:** [August 10, 2025, 3:48pm UTC](https://discourse.shapr3d.com/t/offset-constraints-not-updating-properly/39080/2 "2025-08-10T15:48:13Z")

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Additional information:

The angle of the arc on the left and right change with adjustments to the size of the base due to the nature of the model. They came to be due to a Loft being used from a circle to a sloped rectangle (Recangle using curvature of the same circle on 2 ends, I’m not sure how to describe it otherwise).

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/b/a/ba83f92f35b04396a6a70ba93dd84ac15bf84bb5.jpeg)

Could this be the root of the problem?

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**Author:** ![Xdrakosha](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/xdrakosha/32/24881_2.png) [@Xdrakosha](https://discourse.shapr3d.com/u/Xdrakosha)\
**Post date:** [August 10, 2025, 4:03pm UTC](https://discourse.shapr3d.com/t/offset-constraints-not-updating-properly/39080/3 "2025-08-10T16:03:46Z")

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> [@Genesis](#):
>
> Does anyone have an idea on how to sort out this issue?

User face offset to achieve your goal.

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<div class="post-metadata">

**Author:** ![Genesis](https://avatars.discourse-cdn.com/v4/letter/g/96bed5/32.png) [@Genesis](https://discourse.shapr3d.com/u/Genesis)\
**Post date:** [August 10, 2025, 4:12pm UTC](https://discourse.shapr3d.com/t/offset-constraints-not-updating-properly/39080/4 "2025-08-10T16:12:42Z")

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Hello, I don’t think I quite understand how that would solve this case.

Could you elaborate?

Cheers!

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<div class="post-metadata">

**Author:** ![Genesis](https://avatars.discourse-cdn.com/v4/letter/g/96bed5/32.png) [@Genesis](https://discourse.shapr3d.com/u/Genesis)\
**Post date:** [August 10, 2025, 4:15pm UTC](https://discourse.shapr3d.com/t/offset-constraints-not-updating-properly/39080/5 "2025-08-10T16:15:42Z")

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Update:

I tried the same process, this time using a fixed straight line on the sides.

With this, the offset-constraints work flawlessly.

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/d/9/d9cb9887b23440712cf9fa69899e6b04bcecf6b9.jpeg)

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**Author:** ![Xdrakosha](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/xdrakosha/32/24881_2.png) [@Xdrakosha](https://discourse.shapr3d.com/u/Xdrakosha)\
**Post date:** [August 10, 2025, 4:22pm UTC](https://discourse.shapr3d.com/t/offset-constraints-not-updating-properly/39080/6 "2025-08-10T16:22:18Z")

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> [@Genesis](#):
>
> Could you elaborate?

Sure. Here is a video.

https://www.youtube.com/embed/iZwb2WXtrqY?feature=oembed&wmode=opaque

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<div class="post-metadata">

**Author:** ![Genesis](https://avatars.discourse-cdn.com/v4/letter/g/96bed5/32.png) [@Genesis](https://discourse.shapr3d.com/u/Genesis)\
**Post date:** [August 10, 2025, 4:23pm UTC](https://discourse.shapr3d.com/t/offset-constraints-not-updating-properly/39080/7 "2025-08-10T16:23:16Z")

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Hello @Xdrakosha ,

I figured it out now (a second before you sent the videom but its really helpful regardless!), thanks!

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/6/d/6d76b02ee66a04599914ac06abaea1ace37d6c5a.jpeg)

Cheers!

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<div class="post-metadata">

**Author:** ![SCALEMODEL](https://avatars.discourse-cdn.com/v4/letter/s/77aa72/32.png) [@SCALEMODEL](https://discourse.shapr3d.com/u/SCALEMODEL)\
**Post date:** [August 10, 2025, 4:42pm UTC](https://discourse.shapr3d.com/t/offset-constraints-not-updating-properly/39080/8 "2025-08-10T16:42:16Z")

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You could have also used the original sketch added the offset and extruded the female part, instead of utilizing projected sketch.

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<div class="post-metadata">

**Author:** ![Xdrakosha](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/xdrakosha/32/24881_2.png) [@Xdrakosha](https://discourse.shapr3d.com/u/Xdrakosha)\
**Post date:** [August 10, 2025, 4:45pm UTC](https://discourse.shapr3d.com/t/offset-constraints-not-updating-properly/39080/9 "2025-08-10T16:45:05Z")

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> [@SCALEMODEL](#):
>
> You could have also used the original sketch added the offset

If original sketch has splines problem won’t go away.

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<div class="post-metadata">

**Author:** ![SCALEMODEL](https://avatars.discourse-cdn.com/v4/letter/s/77aa72/32.png) [@SCALEMODEL](https://discourse.shapr3d.com/u/SCALEMODEL)\
**Post date:** [August 10, 2025, 5:45pm UTC](https://discourse.shapr3d.com/t/offset-constraints-not-updating-properly/39080/10 "2025-08-10T17:45:29Z")

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I think it was started with Circle/ARC but Loft converted that to Splines based the second screenshot above.

But if the sketch was started as Splines, it looks simple enough it should be converted to ARC if you need that adjustability. But again if you loft ARC and project it will be converted to Spline again.

Why Shapr3d didn’t include SPLINE for Offset Constraint? 🤷‍♂️ Mindboogling.

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<div class="post-metadata">

**Author:** ![Xdrakosha](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/xdrakosha/32/24881_2.png) [@Xdrakosha](https://discourse.shapr3d.com/u/Xdrakosha)\
**Post date:** [August 10, 2025, 7:21pm UTC](https://discourse.shapr3d.com/t/offset-constraints-not-updating-properly/39080/11 "2025-08-10T19:21:56Z")

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> [@SCALEMODEL](#):
>
> Why Shapr3d didn’t include SPLINE for Offset Constraint?

Before they introduce offset constraint you alway could use distance constraint to achieve the same result. I believe they just use distance constraint for new offset constraint under the hood. But where is no distance constraint for splines. So offset don’t have it too.