Line Modifier Attributes

Shape

Determines the shape of the line modifier. There will be no effect outside the bounds of the selected shape. The Dropoff graph attribute is defined relative to the shape, such that the right edge of the dropoff is the outer edge of the shape, and the left is the shape’s center.

Width Scale

Multiplies the current line width. A value of 1.0 will have no effect and a value of zero will scale the width to zero.

Width Offset

Adds on to the current line width. A value of 0.0 will have no effect and a value of 1.0 will increase the width by one.

Opacity Scale

Multiplies the current line opacity. A value of 1.0 will have no effect and a value of zero will scale the opacity to zero.

Opacity Offset

Adds on to the current line opacity. A value of 0.0 will have no effect and a value of 1.0 will make the lines fully opaque.

Surface Offset

Adds on to the current line surface offset. A value of 0.0 will have no effect and a value of 1.0 will increase the offset by 1.0. Negative values will clamp when an offset of 0 is achieved.

Line Extend

Adds on to the current line extend. A value of 0.0 will have no effect and a value of 1.0 will increase the extend by 1.0. Negative values will clamp when an extend of 0 is achieved.

Modify Color

If this option is turned on, the color value is blended with the line color based on the dropoff value.

Color

If Modify Color is turned on, then this color is blended into the local line color based on the dropoff value.

Dropoff

Dropoff is the loss of individual leaves, twigs, flowers, tubes, and so on—either a few or many, depending on the Dropoff settings you specify.

This setting determines the range of effect within the bounds of the modifier. If the dropoff is set to a constant value of 1.0 (horizontal line) then lines will be uniformly modified inside the bounds of the dropoff shape, with a hard transition at the shape edge. If the right edge of the dropoff is instead ramped down to zero the transition will be gradual, with no modulation at the shape edge, with increasing modulation towards its center. The dropoff graph attribute is defined relative to the shape, such that the right edge of the dropoff is the outer edge of the shape, and the left is the shape’s center.

Dropoff Noise

Modulates the dropoff value with a 3D noise. This can provide variation for the parameters being modulated. For example the tube width can be randomized or wiggled in a noisy fashion using this attribute.

Noise Frequency

Controls how detailed the Dropoff Noise is. Lower values result in a smoother noise. The 3D noise is defined relative to the local space of the line modifier shape.

Brush Tube Attributes

For these settings to have any effect, they require a Paint Effects brush to be used with tubes turned on.

Force

Acts as a force pushing tubes away from the center of the line modifier shape. Positive values will push away from the center while negative values will push towards the center. To have an effect this requires that a brush be used with tubes turned on. For example, use this to push Paint Effects trees as if with the wind.

Directional Force

Acts as a force pushing tubes along the local x axis of the line modifier shape. To have an effect this requires that a brush be used with tubes turned on.

Displacement

Acts as a displacement pushing tubes away from the center of the line modifier shape. Positive values will push away from the center while negative values will push towards the center. This is similar to the force attribute, but tube segments further down the tube are not affected by the offset. To have an effect this requires that a brush be used with tubes turned on.

Directional Displacement

Acts as a displacement pushing tubes along the local axis of the line modifier shape. To have an effect this requires that a brush be used with tubes turned on. This is similar to the directional force attribute, but tube segments further down the tube are not affected by the offset.

Tube Scale

Scales the length and width of generated Paint Effects tubes. A value of 1.0 will have no effect and a value of 0.0 will scale the tubes to nothing, resulting in no tubes generated. The behavior is similar to modifying the brush’s Global Scale. To have an effect this requires that a brush be used with tubes turned on.

Tube Dropout

Reduces the number of Paint Effects tubes generated. A value of 0.0 will have no effect and a value of 1.0 will result in no tubes generated. To have an effect this requires that a brush be used with tubes turned on.

Leaf Scale

Multiplies the size of leaves used by the Paint Effects brush. A value of 1.0 will have no effect and a value of 0.5 will reduce leaf size by half. To have an effect this requires that a brush be used with tubes turned on.

Leaf Dropout

Adds on to the current leaf dropout value used by the Paint Effects brush. A value of 0.0 will have no effect and a value of 1.0 will increase the dropout by 1.0. To have an effect this requires that a brush be used with tubes turned on.

Flower Scale

Multiplies the size of flowers used by the Paint Effects brush. A value of 1.0 will have no effect and a value of 0.5 will reduce flower size by half. To have an effect this requires that a brush be used with tubes turned on.

Flower Dropout

Adds on to the current flower dropout value used by the Paint Effects brush. A value of 0.0 will have no effect and a value of 1.0 will increase the dropout by 1.0. To have an effect this requires that a brush be used with tubes turned on.

Branch Dropout

Adds on to the current branch dropout value used by the Paint Effects brush. A value of 0.0 will have no effect and a value of 1.0 will increase the dropout by 1.0. To have an effect this requires that a brush be used with tubes turned on.

Twig Dropout

Adds on to the current branch dropout value used by the Paint Effects brush. A value of 0.0 will have no effect and a value of 1.0 will increase the dropout by 1.0. To have an effect this requires that a brush be used with tubes turned on.