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Landscape Brushes

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The Landscape tool's brush defines the size and shape of the area of the Landscape that will be affected by either sculpting or painting. Brushes can have different shapes, sizes, and falloffs. Brushes should be a familiar concept to anyone who has experience using Photoshop or a similar image-editing application.

You can set the brush type and falloff in either Sculpt or Paint mode.

Brush Settings

Property

Description

Brush Size

This determines the size of the brush in Unreal Units including the falloff. Within this area, the brush will have at least some effect.

Brush Falloff

This determines the percentage from the brush's extents where the falloff should begin. Essentially, this determines how hard the brush's edges are. A falloff of 0.0 means the brush will have full effect throughout with hard edges. A falloff of 1.0 means the brush will only have full effect at its center, and the effect will be reduced throughout its entire area to the edge.

Use Clay Brush

If selected, uses a clay brush.

The size and falloff of the current brush is displayed in the viewport as a flashing, light-purple filled circle, or pair of concentric circles.

Falloff00.jpg

Falloff05.jpg

Falloff10.jpg

Falloff: 0.0

Falloff: 0.5

Falloff: 1.0

Circle

Circle Brush

The Circle brush applies the current tool in a circular area, with a falloff defined both numerically and by type.

circle.jpg

Circle Brush Falloff Type

Icon

Type

Description

Smooth Falloff

Smooth

A linear falloff that has been smoothed to round off the sharp edges where the falloff begins and ends.

Linear Falloff

Linear

A sharp linear falloff, without rounded edges.

Spherical Falloff

Sphere

A half-ellipsoid-shaped falloff that begins smoothly and ends sharply.

Tip Falloff

Tip

A falloff with an abrupt start and a smooth ellipsoidal end. The opposite of the Sphere falloff.

Below is an example of each of these falloff types when operating on the heightmap, with the same radius and falloff:

Smooth.jpg

Linear.jpg

Sphere.jpg

Tip.jpg

Smooth

Linear

Spherical

Tip

Alpha

Alpha Brush

The Alpha brush is similar to the Pattern brush, but instead of tiling the texture across the Landscape as you paint, it orients the brush texture in the direction of your painting and drags the shape as you move the cursor.

brush_alpha_drag.jpg

Alpha Brush Settings

Alpha Brush Settings

Setting

Description

Texture

Sets the Texture to be used, assigned from the Content Browser.

Texture Channel

Sets the Alpha brush's contents to the data from the corresponding channel of the Texture that is currently assigned.

Brush Size

Sets the size of the brush.

Use Clay Brush

If selected, uses a clay brush.

Pattern

Pattern Brush

The Pattern brush allows you to use an arbitrary shape for the brush by sampling a single color channel from a texture to use as the alpha for the brush. The texture pattern is tiled as the brush is painted.

For example, the textures below could be used as the alpha:

alpha_tex.jpg alpha_tex_checker.jpg

Those would result in the following brushes:

alpha_pattern.jpg alpha_applied.jpg

alpha_pattern_checker.jpg alpha_default_checker.jpg

Pattern Brush Settings

Pattern Brush Settings

Setting

Description

Texture

Sets the Texture to be used, assigned from the Content Browser.

Texture Channel

Sets the Pattern brush's contents to the data from the corresponding channel of the Texture that is currently assigned.

Brush Size

Sets the size of the brush.

Brush Falloff

Sets the brush falloff.

Use Clay Brush

If selected, enables you to use a clay brush.

Texture Scale

Sets the size of the sampled Texture in relation to the surface of the Landscape.

alpha_default.jpg alpha_texscale.jpg

Texture Rotation

Sets the rotation of the sampled texture in relation to the surface of the Landscape.

alpha_texrot_default.jpg alpha_texrotation.jpg

Texture Pan [U/V]

Sets the offset of the sampled texture on the surface of the Landscape.

alpha_default.jpg alpha_texpan.jpg

Component

Component Brush

The Component brush is used for operating on individual components. The cursor becomes limited to a single component at a time:

selection_cursor.jpg

The Component brush is the only brush available when you are using tools that operate on the individual component level.

Gizmo

Gizmo Brush

The Gizmo brush is used for modifying your Landscape with Landscape Gizmos, which are tools that you use to perform actions to a specific localized area of the Landscape.

The Gizmo brush is available only when you are using the Copy/Paste tool in Sculpt mode.

For more information about Gizmos, see Landscape Gizmos .