V-Ray UV Randomizer

The V-Ray UVWGenRandomizer allows applying random offset, rotation, and scale to textures. It is used by connecting it to the uvCoord attribute of a texture node.

Face – Considers the face IDs of the object when feeding the data (color or texture) to the material.

Particle – Assigns random colors based on ParticleID.

Instance – Assigns random colors based on InstanceID (works for Alembic instances).

Render ID – Assigns random colors based on RenderIDs.

Object ID – Considers the Object IDs of the object when feeding the data (color or texture) to the material.

Node Handle – Each node in Houdini is assigned a unique number (a handle) when it is created. This option generates the color index based on that node ID. It is useful because the node handle survives through scene editing - e.g. if you add/remove other objects, or rename them, you still get the same colors.

Node Name – Generates a color index based on the name of the node that the texture is applied to. This allows the color to remain consistent if the object is merged into another scene, or X-Ref'd, etc.

Mesh Element – Assigns random colors based on element (e.g. teapot lid, etc.) IDs of the object.

Stochastic Tiling – Changes the mapping based on the UV tile.

Tile Blend – Edge blending between adjacent tiles when Stochastic Tiling mode is enabled.

Seed – Changes the randomization pattern.

U Offset – Controls the position of the texture along the U axis.

V Offset – Controls the position of the texture along the V axis.

UV Rotation – Rotates the texture along the U or V axis.

U Scale – Scales the texture along the U axis.

Unlock V Scale – Enables scaling along the V axis. When disabled, the V Scale is the same as the U Scale.

V Scale – Scales the texture along the V axis.

U Flip – Flips the texture on a random principle along the U axis.

V Flip – Flips the texture on a random principle along the V axis.