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This page provides information about the V-Ray Scatter Component Components in Grasshopper.


Overview

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V-Ray Scatter tab stores the following Scatter components for creation in Grasshopper: V-Ray Scatter 2, V-Ray Scatter Area Modifier, V-Ray Spline Scattering, V-Ray Surface Scattering, V-Ray Volume Scattering, and the 3D Domain Components.


V-Ray Scatter 2 – Creates instances of the input V-Ray Geometry with random transformations, optionally with collision avoidanceGuest objects based on various distribution controls. The number of scattered instances depends on the density . Density which is calculated by the number of instances per square unit.

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Input Parameters

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V-Ray Scatter Area Modifier – Scatters Guest objects everywhere on the Host objects, except for or exclusively in the areas defined by objects from this component. Used as V-Ray Scatter 2 component’s Area Modifier input.
V-Ray Spline Scattering – Creates instances of the input Scatter 2 Guests scattered along splines (Scatter 2 Hosts). Used as a V-Ray Scatter 2 component’s Scattering Configuration input.
V-Ray Surface Scattering – Creates instances of the Scatter 2 Guests scattered on surfaces (Scatter 2 Hosts). Used as a V-Ray Scatter 2 component’s Scattering Configuration input.
V-Ray Volume Scattering – Creates instances of the input Scatter 2 Guests scattered inside the object's bounding box (Scatter 2 Hosts). Used as a V-Ray Scatter 2 component’s Scattering Configuration input. Keep in mind that bounding boxes are cube-shaped, therefore using this mode on a round object scatters instances in a cube around it. 

Construct Domain 3 – Creates a three-dimensional domain from six numbers. Used as a Scatter 2 Random Translation, Random Rotation and Random Scale input.
Construct Domain 3 – Creates a three-dimensional domain from three simple domains. Used as a Scatter 2 Random Translation, Random Rotation and Random Scale input.
Domain 3 – Contains a collection of three-dimensional domains. 3D Domains are typically used to represent volume fragments. A three-dimensional domain consists of three one-dimensional domains. Used as a Scatter 2 Random Translation, Random Rotation and Random Scale input.

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Example Connections

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Here is an example of how the Scatter components are connected.

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Seed (Integer) – Controls the random seed of the scatter. Changing this value and refreshing gets you a different random distribution.

Collision (Boolean) – When enabled, bounding boxes of instances that overlap other instance bounding boxes are skipped.

Density (Number) – Determines the approximate count of instances in a square unit. The density value can be used with a texture in place. Black color texture discards all instances in the area. Areas colored with white receive maximum density.

Map (AColorTex) - Specifies a texture map for the probability of an instance to appear at given point on the host's surface. Black color in the texture discards all instances in the area. Areas colored with white receive maximum density. 

Axis Filter (Integer) – Filters the faces used for instance positioning.

All Faces – The points/instances are generated uniformly on all object faces.
Facing Up – The points/instances are placed only on object faces oriented upwards in the scene. Note that host component transformations are ignored. 

Orientation (Integer) – Sets the initial orientation of the instances.

World Up – All instances are positioned upright independent of the base/host surface face normals.
Along Normals – The instances are oriented based on the base surface face normals. 

Rotation (Domain) – Sets a range for the minimum and maximum angle for the random instance rotation around its up axis. 

Scale (Domain) – Sets a range for the minimum and maximum factors for the random instance scaling. 

Origin (Integer) – Determines how objects are positioned relative to the random Scatter points.

Bounding box bottom center – The bounding box bottom center of the object matches the Scatter point.
Bounding box volume center – The bounding box volume center snaps to the Scatter point.
Object origin – The original object origin point snaps to the Scatter point.

Weight (Number) – Determines a list of factors for the relative probability of each guest to appear.

V Geo (Generic Data) – Sets a list of V Geo objects to scatter.

Host (Generic Data) – Makes a list of meshable geometric objects to scatter the guests over.

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Output Parameters

V Geo (Generic Data) – Sets a V-Ray Geometry output. Can be connected to the V-Ray Render/Geometry slot. 

X (Transform) – Sets a data tree of transformations making the guests distribution over the hosts.

Workflow

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<iframe width="560" height="315" src="https://www.youtube.com/embed/ABhy1UXxuj8?list=PLm2Irfq-UvZ3D79zJ1kQuugYllXluT4yP" title="V-Ray for Grasshopper - Staging your design with Chaos Cosmos & Scatter" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

Example

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Footnotes

Starting with V-Ray 6.10.01, Scatter V-Ray Geometry Guest objects are now visible in the rendering. Toggle off the Visible property to exclude them from the rendering.

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