Straighten UVs

Straighten UVs by aligning them

1. Select the UVs you want to align.
2. In the UV Toolkit, open the Align & Snap section.
3. Click one of the Align buttons to align the UVs relative to the furthest one in the appropriate direction.

Straighten UVs by adjusting their angles to adjacent UVs

1. Select the UVs you want to align.
2. In the UV Toolkit, open the Unfold section.
3. Next to Straighten UVs, set the Maximum Angle and Axes to straighten along.
4. Click Straighten UVs.

Straighten UVs by matching them to a grid

1. Select the UVs you want to align.
2. In the UV Toolkit, open the Align & Snap section.
3. Click Match Grid.

You can Shift + click the button to open the Grid UVs Options, which allow you to alter customize the size of the grid that the UVs will align to. Note that this is not necessarily reflected by the visible grid in UV space.

Straighten a selected edge loop and then unfold around it

1. Select a UV or edge loop.
2. In the UV Toolkit, open the Unfold section.
3. Click Straighten Shell.

Straighten a UV border

1. In the UV Editor, select the UVs around the tangled UV border.

   It doesn’t matter if you select interior UVs along with border UVs. Straighten UV Border only acts on the borders.

   In some cases, it is difficult to select the UVs you want to straighten without selecting other UVs you want to leave unaffected. In these cases, you can leave a gap in your selection and use the Fill Gaps in Selection option to straighten the UVs you could not select.

2. Select Modify > Straighten UV Border (or alternatively, UV > Straighten UV Border in the main menu bar).
3. Select the polyStraightenUVBorder node and edit the attributes in the Attribute Editor or Channel Box.