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# Vertex Editing

Vertex Editing allows you to change the shape of a brush by moving its vertices that define the shape.

## Two ways to do the same thing

### Camera mode

1. Select camera mode from the toolbox

2. Select a brush
3. Hold down the CTRL key use the Left Mouse Button (LMB) on a vertex. A red cross appears on that vertex. This is the pivot.
4. Hold down ALT + and drag the LMB.

### Vertex Edit mode

1. Select vertex edit mode from the toolbox.

2. Select one or more brushes. The red builder brush can be selected too.
   - In UnrealEd 2, the brush vertices highlight to grey squares.

   - In UnrealEd 3, the brush color changes to selected as found in the UnrealEd Advanced Options.

3. Hold either ALT-Gr or CTRL + ALT, click in empty space in an 2D UnrealEd Viewport and drag a marquee selection rectangle around the vertices you wish to select.

   When you release, the boxes on selected vertices turn white.

4. CTRL-click on any of the white-highlighted vertices and drag to move them. Be careful not to start the click & drag too close to another brush, or that will become selected too.

To add vertices to the current selection, repeat the procedure, holding SHIFT as well, ie CTRL+SHIFT+ALT or SHIFT+ALT-Gr.

## Mode differences

### Selecting multiple vertices

- Camera mode allows only one vertex to be moved at a time.
- Vertex Edit mode allows the rectangular marquee to select multiple vertices.

### Moving Stacked Vertices Simultaneously

Because the 2D UnrealEd Viewport cannot display depth, sometimes your brush will only show one vertex where 2 or more exist in 3D space. This can be demonstrated with a cube. Choose the right mode depending if you want to move one or more stacked vertices.

- Camera mode selects only one vertex
- Vertex Edit mode selects all stacked vertices

## Problems

- At 16 grid units or lower, dragging vertices zip around too fast
- At 64 grid units or higher, dragging vertices feel sticky
- Therefore, 32 or 16 is best.
- Brushes can occasionally 'break' when vertex editing. The cause for this is unknown but the effect will likely result in a BSP Hole.

## Related Topics

- UnrealEd Interface is the main reference for the interface in general
- Moving vertices is usually done in one of the 2D UnrealEd Viewports
- Toolbox covers all the buttons down the left-hand side of the UnrealEd window
- See Mouse Control for more information on mouse actions in different modes.

## Comments

Sobiwan: I still cant figure out what "Alt-gr" is. Anyone?

Tarquin: "Alt-gr is the right-hand Alt key on European keyboards.

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