Voronoi 3D A Vector

Noise

Perlin 3D Scalar

Perlin 4D Scalar

Smooth Voronoi 3D Cell Colour

Smooth Voronoi 3D Cell Scalar

Voronoi 3D A Vector

Voronoi 3D B Vector

Voronoi 3D Cell Colour

Voronoi 3D Cell Scalar

Voronoi 3D Diff Scalar

Smooth Voronoi 3D A Vector

Overview

The Voronoi 3D A Vector and Voronoi 3D B Vector nodes generate Voronoi noise and output the noise value as a vector. Voronoi noise has the appearance of being divided up into different cells. Here are examples of the noise patterns generated by the nodes. Note that the output vector of the nodes was converted to a greyscale colour to better show the pattern.

Voronoi 3D A Vector noise

Voronoi 3D B Vector noise

This node requires a Get position, Get position in geometry, or Get position in texture function node to be assigned to its Main input so that the current render state knows where a sampled point is located in texture space.

Node Network view of Voronoi 3D A Vector with required node for position in texture space, and optional nodes to drive scale and seed values.

Rendered top view of Voronoi 3D A Vector noise pattern.

Render perspective view of the same Voronoi 3D A Vector used for displacement.

Settings:

• Name: This setting allows you to apply a descriptive name to the node, which can be helpful when using multiple Voronoi 3D A Vector nodes in a project.
• Enable: When checked, the node is active, and when unchecked the node is ignored.
• Scale: The scale setting controls the overall scale of the noise pattern generated. Increasing the scale value make it seems like the cells in the noise are larger.
• Seed: The seed value controls the noise pattern generated. Each seed value generates a slightly different pattern.

A vector is a set of three scalars, normally representing X, Y and Z coordinates. It also commonly represents rotation, where the values are pitch, heading and bank.

A single object or device in the node network which generates or modifies data and may accept input data or create output data or both, depending on its function. Nodes usually have their own settings which control the data they create or how they modify data passing through them. Nodes are connected together in a network to perform work in a network-based user interface. In Terragen 2 nodes are connected together to describe a scene.

Literally, to change the position of something. In graphics terminology to displace a surface is to modify its geometric (3D) structure using reference data of some kind. For example, a grayscale image might be taken as input, with black areas indicating no displacement of the surface, and white indicating maximum displacement. In Terragen 2 displacement is used to create all terrain by taking heightfield or procedural data as input and using it to displace the normally flat sphere of the planet.