Scatter

||Asset Editor|| > Create Asset > Geometries > Scatter

||Asset Editor|| > Geometries (right-click) > Scatter

||Extensions|| > V-Ray > V-Ray Objects > Scatter over Selection

||V-Ray Objects Toolbar|| > Scatter over Selection

||V-Ray Objects Toolbar|| > Scatter Viewer

The V-Ray Scatter button is inactive until an object is selected in the viewport window. When you select an object in the scene the V-Ray Scatter button will become active.

V-Ray Scatter consists of two types of objects - Host object and Guest objects that are scattered over the Host object's surface.

Scatter Host object can be created from the Extensions menu > V-Ray > V-Ray objects > Scatter over Selection or from the Asset Editor > Geometry > Scatter and use the Apply to Selection option.

After creating a V-Ray Scatter Host object, a bounding box with a V-Ray Scatter icon will appear in the viewport around the selected object.

Guest objects can be introduced to the Host object in two ways. 

• Select an object in the viewport and use the Add Guests button in the Asset Editor. The object appears under the Add Guests button.
• Quick way to introduce a Guest object is to drag and drop a preselected object from the viewport on to the Host object. In this case the Guest object can be removed by using the drag + shift function.

Density – Determines the approximate count of instances in a square meter. When a texture is used, the density value can still be used. Black color in the texture discards all instances in the area. Areas colored with white receive maximum density.

Seed – Controls the random seed of the Scatter. Change the integer value and refresh to get a different random distribution.

Axis Filter – Filters the faces that will be used for instance positioning.

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

Orientation – Specifies 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.

Collision Detection – If turned on, bounding boxes of instances that overlap any other instance bounding box will be skipped.

Add Guests – Adds the currently selected scene objects to the Guests list. The objects in this list are scattered on the base geometry.

Guest Origin – Determines how the objects are positioned relative to the random Scatter points.

Bounding box bottom center – The bounding box bottom center of the object is matched to the instance point.
Bounding box volume center – The bounding box volume center snaps to the instance point.
Object origin – The original object origin point snaps to the instance point.

Preview Mode – Changes between a Bounding Box or Point Preview for the instances. Note that the point positions are determined by the origin of the guest.

Preview Percentage – Limits the number of previews displayed in the viewport. Use this to optimize the viewport performance.

Rotation Min – Minimum angle for the random instance rotation around its up axis.

Rotation Max – Maximum angle for the random instance rotation around its up axis.

Random Min – Minimum factor for the random instance scaling.

Random Max – Maximum factor for the random instance scaling.

Scale Multiplier – Uniform scale multiplier for the instances. This value is combined with the random scaling.