Build Modifier

The Build modifier make strokes appear or disappear in a frame range to create the effect of animating lines being drawn or erased.

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This documentation refers to the Build Modifier specific to the Grease Pencil object. For uses with other object types refer to the general Build Modifier.

Options

The Build modifier.

Mode

Determines how many strokes are being animated at a time.

Sequential

Strokes appear/disappear one after the other, but only a single one changes at a time.

Concurrent

Multiple stroke appear/disappear at a time.

Additive

Builds only the strokes that are new compared to last keyframe. The assumption is Additive Drawing was used so that the shared strokes are the same.

Transition (in Sequential and Concurrent Mode)

Determines the animation type to build the strokes.

Grow

Shows points in the order they occur in each stroke, from first to last stroke. (Simulating lines being drawn.)

Shrink

Hide points from the end of each stroke to the start, from last to first stroke. (Simulating lines being erased.)

Vanish

Hide points in the order they occur in each stroke, from first to last stroke. (Simulating ink fading or vanishing after getting drawn.)

Timing

The way you want to time the building of the strokes.

Natural Drawing Speed (in Sequential and Additive Mode)

Use the recorded speed of the stylus when the strokes were drawn.

Speed Factor

The recorded speed is multiplied by this value.

Maximum Gap

The maximum gap between strokes in seconds.

Number of Frames

Set a fixed maximum number of frames for the build animation. (Unless another Grease Pencil keyframe occurs before this time has elapsed.)

Frames

The maximum number of frames used.

Delay

Number of frames after each Grease Pencil keyframe before the modifier has any effects.

Percentage Factor

Manually set a percentage factor to control the amount of the strokes that are visible.

Factor

The factor from 0 to 1.

Time Alignment (in Concurrent Mode)

Align Start

All stroke start at the same time (i.e. shorter strokes finish earlier).

Align End

All stroke end at the same time (i.e. shorter strokes start later).

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Use the distance to an object to define the order in which strokes appear.

Custom Range

If enabled, only modify strokes during the specified frame range.

Start, End

Determines the start and end frame for the build effect.

Fade

Factor

Defines how much the stroke is fading in/out.

Thickness

How much strength fading is applied to the stroke’s thickness.

Opacity

How much strength fading applies to the stroke’s opacity.

Weight Output

Assign a weight value to points that have started/finished the fade.

Influence Filters

See Influence Filters.