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Vertex Painting

Vertex Painting is a simple way of painting color onto an object, by directly manipulating the color of vertices, rather than textures, and is fairly straightforward.

When a vertex is painted, the colour of the vertex is modified according to the rules of the 'brush'. The color of all visible planes and edges attached to the vertex are then modified with a gradient to the color of the other connected vertices. (Note that the color of non-visible faces are not modified).

Vertex colors can be painted by first going into Edit Mode, then switching to Vertex Paint Mode; however, it will not show up in the render unless you check "Vertex Color Paint" in the Materials Options Panel.

Vertex Painting Mode
Check this box


Settings

The Tools Shelf, shortcut T contains most of the options for vertex painting. The following sections describe the controls in each of the available panels.

Settings for vertex painting

Brush

Brush Datablock
The image, name panel and color selector at the top allows you to select brush presets, rename brushes, as well as add custom brushes, and delete them.
Radius
Set the radius of the brush
Strength
Set the strength of the brush's effect.
Mix overlay with full strength
Blend menu
Mix
Mixes RGB values. When set to a strength of 1.0, it will cover the underlying "paint".
Add
Adds RGB values. Will eventually turn the entire object white as RGB values accumulate to 1.0-1.0-1.0: Pure White.
Subtract
Subtracts RGB values. Usually results in Black.
Multiply
Multiplies brush colors by the vertex colors.
Blur
Blurs vertex colors.
Lighten
Lightens the color of the vertices.
Subtract with full strength
Darken
Darkens the color of the vertices.




Texture

Use the texture selector at the bottom of the paint panel to select a pre-loaded image or procedural texture to use as your brush pattern. Note that in order to use it, you must have a placeholder material defined, and that particular texture defined using the Material and Texture buttons. It is not necessary to have that material or texture applied to any mesh anywhere; it must only be defined.

Brush Mapping Mode
Sets how the texture is applied to the brush
View Plane
In 2D painting, the texture moves with the brush
Tiled
The texture is offset by the brush location
3D
Same as tiled mode
Stencil
Texture is applied only in borders of the stencil.
Random
Random applying of texture.
Angle
This is the rotation angle of the texture brush. It can be changed interactively via CtrlF in the 3D view. While in the interactive rotation you can enter a value numerically as well. Can be set to:
User
Directly input the angle value.
Rake
Angle follows the direction of the brush stroke. Not available with 3D textures.
Random
Angle is randomized.
Offset
Offset the texture in x, y, and z.
Size
Set the scale of the texture in each axis.

Stroke

Stroke Method
Allows set the way applying strokes.
Airbrush
Flow of the brush continues as long as the mouse click is held, determined by the Rate setting. If disabled, the brush only modifies the color when the brush changes its location.
Rate
Interval between paints for airbrush
Space
Creates brush stroke as a series of dots, whose spacing is determined by the Spacing setting.
Spacing
Represents the percentage of the brush diameter. Limit brush application to the distance specified by spacing.
Dots
Apply paint on each mouse move step
Jitter
Jitter the position of the brush while painting
Smooth stroke
Brush lags behind mouse and follows a smoother path. When enabled, the following become active:
Radius
Sets the minimun distance from the last point before stroke continues.
Factor
Sets the amount of smoothing.
Input Samples
Average multiple input samples together to smooth the brush stroke.
Various brush curves

Curve

Brush Curves affect how strongly the color is applied depending on distance from the center of the brush. In other words, they allow you to edit the Falloff of the brush intensity.

Options

Options for vertex painting

Overlay

Allows you to customize the display of curve and texture that applied to the brush.

Appearance

Allows you to customize the color of the brush radius outline, as well as specify a custom icon.

Options

Normals
Applies the Vertex Normal before painting. This does not usually affect painting.
Spray
Continues painting for as long as the mouse is held.
Unified Settings
Size
All brushes use the same size.
Strength
All brushes use the same strength.