Question: I have converted an edge loop to a curve. The edge loop itself was fairly low poly. I want the curve to look smooth so I tried to increase the resolution of it but it looks exactly the same.

![enter image description here](https://i.stack.imgur.com/Nvun0.png)

Is there a way I can get the curve to be a smooth interpolation of the edge loop?

**[blende file](http://www.pasteall.org/blend/28013)**

Answer: 
This is because the converted curve is a *Poly* spline.

To convert it to a smoothly interpolated curve:

1. Convert it to a Bezier or NURBS spline in *3D view > Tool shelf > Curve Tools > Set Spline Type*:

![enter image description here](https://i.stack.imgur.com/nVW7N.png)
2. Then convert all the Control Vertices to *Auto* (or something besides *vector*) by pressing `A`*> Select all* `V`*> Automatic*.

Now you can adjust the *Resolution* as desired to adjust the "smoothness":

![enter image description here](https://i.stack.imgur.com/0rJ43.png)
After converting the mesh to a curve, go into edit mode, then in the Modeling section of the Tools tab, click on Smooth several times.

![enter image description here](https://i.stack.imgur.com/qYIGV.gif)