Stretching UV map to fit bounds

Hi all,

First off, apologies - I’m a blender newbie, and I’ve been having a ton of difficulty modifying the UV mappings of a 3d arc (kind of shaped like a spectacle lens) to fit the entire UV square. After doing a UV unwrap, this is what I get:


What I’m looking to do is something like this, where vertices are stretched across the UV map:


Sorry again if my question seems rather basic, but I haven’t been able to figure out how to do this without having to edit the UV map on a per-vertex basis.

Thanks,
Saswat

try using the live unwrap function. enable live unwrap, pin the corner vertexes§, then move(G) them to the corners, and the rest of the coordinates will auto-optimize. I don’t know if it will be a perfect square though.

Use the UV squares add-on.

http://wiki.blender.org/index.php/Extensions:2.6/Py/Scripts/UV/Uv_Squares

here’s what I got using live unwrap…I had to pin / reposition all of the outer vertexes though