Smooth pseudo-random 3D noise (simplex) as a scalar field, with values roughly between −1 and +1.
Picks the noise pattern; the same seed always gives the same field.
Feature density: positions are multiplied by this, so a higher value gives smaller, closer features.
Values the block gives besides its output. The editor lists them under Properties, and an input can read one by reference.
The field read as a Solid whose surface is where the field is zero.
The box the field is evaluated in.
The field with its sign flipped (−f), which swaps inside and outside.
The field divided by its gradient length (f/|∇f|) so it reads close to a true distance; the zero set does not move.