Command - UV edit

Screen options

Unwrap: It shows a UV atlas.
CurObj: It shows a UV atlas of the current object only.
Material: It shows UV of only faces to which the current material is assigned.
Texture: It shows a UV atlas of material which has the same texture mapping as the current material.
Select: It shows a UV atlas of only selected faces.
Repeat: It repeatedly shows a mapping image in the plural.
Grid: It shows a grid.
Snap: It sets up to snap grid when the UV vertex is moved.

Object: It shows 3D objects.
Select: It shows 'UV guide' like branches on vertices on which UV is selected.
Crack: The line that is cracked on UV is highlighted on the object.
Distortion: Distortion of UV mapping is shown by a color map.
Color map is set in [Configuration > Display].

Sub-tool panel

Vert / Face / Apex: Specify the method of selection on UV expansions and 3D model.
Only [UV] is displayed, if you set [Enable 'Edit Option' on 3D] available in [Config] of the menu.
Numerical input (U / V / OK): It sets a position, a scaling factor in [Scale], or a rotation angle in [Rotate].

Select / Move / Rotate / Scale

It specifies how to operate on the UV atlas.

You can select vertices on the UV atlas with a rectangle or a rope when you press [Rect] or [Rope] in Edit option.

Expand: It selects continuous vertices from the UV vertex specified on the UV atlas.
Brush: It selects the traced UV vertices by dragging on the UV atlas.
The size of the selection range can be changed by dragging with the Alt key.
Rect: It selects UV vertices in the rectangle by dragging on the UV atlas.
Rope: It selects UV vertices in the freehand region by dragging on the UV atlas.

Magnet

Moving UV vertices continuously within the distance from the position of the UV vertex specified on the UV atlas. You can extend the range of magnet applied with Alt + Drag.


Select vertex and drag		Moving vertices inside yellow circle

Lattice

To modify selected vertices on UV map along the grid.

Base

It is a command to place the grid as a reference.
Increasing the numbers of [Seg.], the grid is split.

Modify

Drag the corner of the grid and deform it, the selected vertices inside the grid is moved in relation.
If you don't select vertices inside the grid, you can select all vertices inside the grid automatically.


Drag corner of the grid		Moving vertices in relation

Fit

Select some vertices on UV map and click [Fit]. The grid is placed automatically including selected vertices.

When [Smooth interp.] is checked, deformation becomes more curvilinear and smooth.

*This option can be switched when the segment number of the lattice are 1 or more.


Interpolation OFF	Interpolation ON

Relax

On UV map, drag the part is automatically adjusted. If you checked [Fix borders], borders of UV map are fixed.


Drag UV map		Solve the entanglement

Split

Disconnect the UV unwrap image along the selected two vertices. You can select vertices continuously with Shift + click.


Select two points		To split UV map

Stitch

When you click UV borders, if there is a corresponding side, UV map is combined. With Shift + click, all of the continuous lines are combined.


Click UV border		To combine UV map

Straighten

It aligns the selected vertices on a straight line. If you checked [Border only], you can select only vertices on UV border.


Select vertices		To align on a straight line

Vertex Slide

Moving the vertices on the object while maintaining the UV deployment.



Select vertex on the object		Drag to move

Auto unwrap (Standard/EX edition only)

Do the automatic unwrapping from 3D object to UV. [Detail]

New mapping

You can newly assign UV coordinate to selected faces by the following projection methods.

- Plane mapping
- Cylinder mapping
- Sphere mapping

Apply: It assigns UV projection to selected faces under the current mapping condition.
Move: It moves a base point of projection mapping.
Rotate: It rotates projection mapping.
Scale: It scales up projection mapping.
Fit: It adjusts a scale-up ratio to a size just fits selected faces.
Property: It adjusts the position, size, and angle of projection mapping with a numerical input.

Auto unwrap (Standard/EX edition only)

Unwrap

Select some lines and do the automatic unwrapping them as the boundary lines.

Default selection

Specify the cracking lines. The lines become the boundary lines of UV unwrapping. Click the point of start and goal of the line you want to specify. And cracking lines are selected.

Snap selection

In this mode, the point of start and goal of the line are only on specified cracking lines.

Remove route

Delete the cracks by branching units.

Select cracks

From current cracks

Select the lines corresponding to the boundary of the current UV expansion.

Automatic

Select cracks automatically.

Denoise - If it is used, the automatic selected lines will be as smooth as possible. It is especially effective for uneven meshes such as 3D scan data, but processing may take time.
Algorithm - Choose from [Fast] or [Smart].

If you select [Smart] in [Algorithm], you can specify the following options.

Maximum branch - Specify the maximum number of branches of cracks.
Remove holes - When holes are in the 3D object, it selects cracks not to make holes on UV.
Remove close surfaces - It selects cracks not to make close surfaces on UV.

Select lines on the object, and press [Execute] button. The following dialog appears.

Unwrap method

Group by selected lines (Always ON)

Selected lines are the boundary. This option is always enabled.

Group by materials

If you checked it, the boundary is selected lines and material border.

Selected faces only

If you checked it, do automatic unwrapping only selected faces.

Algorithm

Changing the method of automatic unwrapping.

Angle base - For the object with a lot of curved surfaces.
LSCM - For the angular object.
For many polygons - For the object with many polygons. The deployment will be faster than others.
Six directions - Deployment like parallel projection from six directions.
Repacking only - Reposition current images.

Packing

Rotate

When you run the automatic deployment, you can specify the orientation of the development view.

None - Development view is not rotated. It is placed in a direction along the axis.
Every 90 degree - It rotates the part of the developed view 90 degrees and place.
Free rotation - Development view is placed in a free orientation.


None	Every 90 degree	Free rotation

Margin

To adjust the margins of the surrounding development view.

Margin accuracy

Detail - When you have specified a texture image, to match the resolution of the image, the margin is set more precisely.
Quick - To set the margins, regardless of the texture image. Processing is faster than [Detail].

Target Range

You can specify the target range of UV mapping.

Repacking mapping images (EX edition only)

If it is checked when executing auto unwrapping, the texture image is repacked according to the change in the UV.

If you press [OK], automatic unwrap is applied.

Modify

To adjusts UV mapping automatically.

If you select and move two or more vertices you want to modify, other vertices are automatically re-deployment.

Algorithm: You can select [Angle base] or [LSCM].
Apply automatically: If it is checked, the result of modifying is automatically applied. Unchecked, modifying is not applied until you press [Execute] button.
Repack images (EX edition only): If it is checked, the texture image is repacked according to the change in the UV.

[UV edit] menu in [Mapping mode]

[UV edit] menu is shown on a menu bar or a sub panel depends on the [Use menus] setting in the [Config].

Normalize

It compulsory moves the position of UV vertices within the proper range when they are located outside the range of 0 - 1. It does not change a visible tension of mapping.

Adjust group size

The size of multiple UV groups is adjusted close to the size ratio of faces on objects.




Faces of the same size on the object are resized evenly on UV development.

Unify

It joins the selected UV vertices.

Separate

It separates the selected UV vertices.

Symmetrize

A pair of selected vertices on UV map is moved to a symmetrical position to the symmetry line.
Pressing [Sym] in [Edit option], the symmetry line is displayed as a blue line. Position of the symmetry line is set [Symmetry center].

Project

It moves the position of UV vertices like the position of polygon faces on 3D screen can be projected on the position of the UV atlas.

Align/U/V

It aligns the position of the selected UV vertices in a straight line vertically or horizontally. [Align] buttons automatically determine the direction to align whether horizontal or vertical. [U] button or [V] button enables to specify the direction manually.

Flip U / Flip V

To flip UV coordinates of the selected face.
[Flip U] is the left and right reversed. [Flip V] is upside down.


Flip U


Flip V

SW Rotate

It replaces UV value of vertices in a polygon face one by one as rotating clockwise.

SW Invert

It replaces the UV value of the vertices in the polygon face as inverting to the reverse direction.

Copy

It records the UV coordinate of the selected face. (See the following [Paste].)

Paste

It assigns the recorded UV coordinate with [Copy] to the currently selected face. The number of vertices of the source face and the destination face must be the same.

Mirror copy

If the object is symmetric to the X/Y/Z axis, the UV value is copied from the half to another. If the object is not symmetry, those UV value is not copied.

Transcript (EX edition only)

The UV value is copied to the current object from another object.
If the number or position of the vertices of each object is different, those value is transferred as much as possible from near the apex.

Repacking (EX edition only)

It stores the positional relation between UV coordinates and texture image. And after editing UV, repack the images according to its memory.

1. Store images

Click [Repacking > Store images], and stores the positional relation between current UV coordinates and texture image.

A stored image

2. Edit

Edit UV by command Move, Rotate or Scale, etc..

Edited UV

3. Repack images

Click [Repacking > Repack images]. Texture images are repacked to match the appearance of the stored images and UV.

Repacked images

Texture image quality may deteriorate if UV deployment has been largely changed.

Export

It exports the atlas as the image file like BMP / JPEG or transfers to the clipboard.

Symmetry center

The position of the symmetry line is changed based on the position of selected one or two vertices.
Pressing [Sym] in [Edit option], the symmetry line is displayed as a blue line.

Config

Length of guide: It specifies a length of a 'branch' displayed by [Screen options > Selected].
Grid: It specifies how many to divide grid for mapping image.
Repeat: It specifies how many to place mapping image in [Repeat] mode.
Symmetry UV distance: It specifies a maximum distance to treat as symmetry UV vertex.
Snap to the center of grid: It snaps not on the crossing of the grid but in the center of the lattice of the grid in [Snap] mode.
Move UV on the object: It can directly move UV value when you drag on the object.
Enable 'Edit Option' on 3D: It specifies whether 'Edit Option' is applied or not when you select on a 3D view. When it is unchecked, an option specified on 'Sub panel' is applied.
Reverse Alt on Scale/Rotate: Operation with or without pressing Alt key is reversed in [Scale] or [Rotate] mode.
Brightness of mapping image: It selects the brightness of mapping image shown as the atlas. Lower brightness if it is hard to see the UV atlas when it is too bright.
Use menus: It specifies whether menus or buttons in the sub panel are shown. You must reboot Metasequoia after changing this item.