# What's wrong with this surface?

**URL:** <https://discourse.mcneel.com/t/whats-wrong-with-this-surface/11195>\
**Category:** Rhino for Windows\
**Created:** [August 27, 2014, 4:03pm UTC](https://discourse.mcneel.com/t/whats-wrong-with-this-surface/11195 "2014-08-27T16:03:30Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![filip\_rooms](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/filip_rooms/32/6370_2.png) [@filip\_rooms](https://discourse.mcneel.com/u/filip_rooms)\
**Post date:** [August 27, 2014, 4:03pm UTC](https://discourse.mcneel.com/t/whats-wrong-with-this-surface/11195/1 "2014-08-27T16:03:30Z")

</div>

Dear community,

Something odd happened to the following surface I created. It was meant to be a closed strip, but seems to contain some holes in rendered view.

When creating a mesh, I also don’t see triangles in the zones where the strip is missing… Any ideas?

Many thanks in advance,

Kind regards,

Filip Rooms

[ProblemSurface.3dm](https://sea3.discourse-cdn.com/mcneel/uploads/default/11734/a46dc51f7f9739d4.3dm) (294.7 KB)

---

<div class="post-metadata">

**Author:** ![pascal](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/pascal/32/479395_2.png) [@pascal](https://discourse.mcneel.com/u/pascal)\
**Post date:** [August 27, 2014, 4:14pm UTC](https://discourse.mcneel.com/t/whats-wrong-with-this-surface/11195/2 "2014-08-27T16:14:09Z")

</div>

Hi Filip - the trim curves are loopy… look closely at the bottom edge trims:

![](https://sea3.discourse-cdn.com/mcneel/uploads/default/11735/8ee14c24b9096fd0.png)

-Pascal

---

<div class="post-metadata">

**Author:** ![filip\_rooms](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/filip_rooms/32/6370_2.png) [@filip\_rooms](https://discourse.mcneel.com/u/filip_rooms)\
**Post date:** [August 28, 2014, 1:18pm UTC](https://discourse.mcneel.com/t/whats-wrong-with-this-surface/11195/3 "2014-08-28T13:18:27Z")

</div>

Thanks Pascal, didn’t zoom in this far.

This helped me to solve my problem 😉