DocumentationSubstance 3DSubstance 3D Painter

UV Random Color

Last update: August 11, 2026

In: utility, mask
Description
The UV Random Color generator assigns solid unique colors to each UV island. This is often useful as a diagnostic tool with complex meshes.

UV Random color can be used either to create a mask (black and white output) or directly as a fill layer for applying color variation to your mesh based on UV islands, for example to randomize each plank of a wooden floor.

Inputs

Input name
Description
Custom Gradient
Use a Gradient map to define the color range.

Parameters

Parameter name
Description
Seed

Set the seed value used to generate the dirt texture.

  • Click Random to switch to another random seed.
  • Click the pencil to see the current seed value, and enter a specific value if desired.
Color Source Mode

Determines the used Color Source Mode.

  • Random: In Random mode the colors are defined and assigned randomly.
  • Custom Gradient: In Custom Gradient mode, you have an additional input to add a custom gradient map where the colors are picked from.
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