Organic Noise
Applies multi-octave simplex noise sampled at world positions for natural, irregular surface variation. Unlike periodic effects that repeat in a predictable pattern, Organic Noise produces non-repeating roughness — like tree bark, stone, or eroded clay.
Parameters
Amplitude- Maximum displacement in mm (0–20). Controls how rough or bumpy the surface becomes.
Scale- Noise frequency (0.01–2). Smaller values produce larger, broader features. Larger values produce finer, more detailed noise.
Seed- Random seed for the noise function (0–1000). Different seeds produce entirely different noise patterns from the same settings.
Octaves- Number of noise layers (1–6). Each octave adds finer detail at half the scale and half the amplitude of the previous one. More octaves create more natural-looking complexity.
How It Works
Organic Noise evaluates a 3D simplex noise function at the world-space position of each vertex. Unlike UV-based effects, the noise is sampled in 3D space, so the pattern wraps naturally around the object without seams.
Multiple octaves are layered using fractal Brownian motion (fBm): each successive octave doubles the frequency and halves the amplitude. At 1 octave, the noise is smooth and blobby. At 6 octaves, it has fine-grain detail layered on top of broad undulations — similar to how real terrain has both mountains and pebbles.