# Cant merge faces, i need to remove the cut line

**URL:** <https://discourse.shapr3d.com/t/cant-merge-faces-i-need-to-remove-the-cut-line/38246>\
**Category:** Modeling Questions\
**Created:** [June 4, 2025, 5:15pm UTC](https://discourse.shapr3d.com/t/cant-merge-faces-i-need-to-remove-the-cut-line/38246 "2025-06-04T17:15:34Z")\
**Posts on this page:** 7\
**Page:** 1

<div class="post-metadata">

**Author:** ![Lucrezia](https://avatars.discourse-cdn.com/v4/letter/l/c68b51/32.png) [@Lucrezia](https://discourse.shapr3d.com/u/Lucrezia)\
**Post date:** [June 4, 2025, 5:15pm UTC](https://discourse.shapr3d.com/t/cant-merge-faces-i-need-to-remove-the-cut-line/38246/1 "2025-06-04T17:15:34Z")

</div>

I’m working on this project and faces have only formed on ONE side. I don’t understand why I can’t manage to create a single smooth strip.  
The system tells me that it’s not possible to merge the faces. I don’t know what to do because I don’t want it to be visible in the technical drawings. The right side is ok.

 ![Immagine 2025-06-04 191426](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/1/4/146c2dd31b1fb89458c4865570d4bdef1d4613f9.jpeg)

[https://support.shapr3d.com/hc/en-us/requests/new](https://support.shapr3d.com/hc/en-us/requests/new)

---

<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:** [June 4, 2025, 5:37pm UTC](https://discourse.shapr3d.com/t/cant-merge-faces-i-need-to-remove-the-cut-line/38246/2 "2025-06-04T17:37:59Z")

</div>

There’s no such thing as “merging faces” in Shapr3D. You can union objects, use replace face tool, and sometimes (but not always) delete edges — but it’s unclear what exactly you need.

Your screenshot doesn’t provide enough information to understand exactly what you’re trying to achieve and which tool you’re trying to use for that.

---

<div class="post-metadata">

**Author:** ![Lucrezia](https://avatars.discourse-cdn.com/v4/letter/l/c68b51/32.png) [@Lucrezia](https://discourse.shapr3d.com/u/Lucrezia)\
**Post date:** [June 4, 2025, 5:51pm UTC](https://discourse.shapr3d.com/t/cant-merge-faces-i-need-to-remove-the-cut-line/38246/3 "2025-06-04T17:51:17Z")

</div>

As you can see on the right side, where i have the curve, i dont have multiple faces. On the left i have a cut

 ![Immagine 2025-06-04 191334](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/e/4/e41a2d46d7e0b0f5a64d595cfa9f7212e6537f31.jpeg)

---

<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:** [June 4, 2025, 6:01pm UTC](https://discourse.shapr3d.com/t/cant-merge-faces-i-need-to-remove-the-cut-line/38246/4 "2025-06-04T18:01:36Z")

</div>

Can you share the project so I can take a look closer?

---

<div class="post-metadata">

**Author:** ![AngelP](https://avatars.discourse-cdn.com/v4/letter/a/46a35a/32.png) [@AngelP](https://discourse.shapr3d.com/u/AngelP)\
**Post date:** [June 5, 2025, 1:48am UTC](https://discourse.shapr3d.com/t/cant-merge-faces-i-need-to-remove-the-cut-line/38246/5 "2025-06-05T01:48:15Z")

</div>

If the modeled object is **completely symmetrical** , one possible solution would be to **insert a plane right through the middle** and use the **Split** tool to cut it in half. Then, **delete the side that has the defect** or doesn’t look as expected.

Next, **mirror the clean half** to reconstruct the full shape. After that, use the **Union (or Merge Bodies)** option to join both halves. As long as everything aligns correctly, the final result should be a **clean, unified body** without visible seams preserving only the side that came out right.

---

<div class="post-metadata">

**Author:** ![Lucrezia](https://avatars.discourse-cdn.com/v4/letter/l/c68b51/32.png) [@Lucrezia](https://discourse.shapr3d.com/u/Lucrezia)\
**Post date:** [June 5, 2025, 11:51am UTC](https://discourse.shapr3d.com/t/cant-merge-faces-i-need-to-remove-the-cut-line/38246/6 "2025-06-05T11:51:17Z")

</div>

Thank you!

---

<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:** [June 5, 2025, 3:37pm UTC](https://discourse.shapr3d.com/t/cant-merge-faces-i-need-to-remove-the-cut-line/38246/7 "2025-06-05T15:37:41Z")

</div>

Check your sketch, this might be the issue.

I suspect right side you used one continuous spline.

The left side vertical line connected with spline. When you go from Spline to Line I found even with tangent applied you will get the vertical line when extruded.

Bottom version, is complete spline, no vertical lines.

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/a/2/a2397a994f086d6f8f4266de999865a917989266.jpeg)

Top version, combination of spline and line

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/2/0/2087a7be0dd20ac99f3ee63127ce2bab3b188f39.jpeg)

Example with combination of arcs, lines with tangents applied.

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/f/d/fd32b897b96858e7060eda539590091fea02fdb2.jpeg)

Normal Circle vs Full Spline

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/5/1/5100d933885933644920ac8f9de053425dcda58c.jpeg)