Noise Field (Noise Field) is a technical term that is extremely important in rendering and optimizing game graphics (technical art). An explanation of the technology that creates fractal pseudo-random force fields such as Perlin noise and Simplex noise in 3D space to impart organic and irregular fluctuations (wind pressure) to the movement of particles.
An analogy in the real world: invisible atmospheric fluctuations in which the breeze (force field) in the forest ``changes irregularly from place to place'' due to gaps between trees and heat convection in the air
Noise Field is anatmospheric fluctuation map in which invisible mini-tornadoes and minute updrafts (3D noise vectors) are tightly and randomly arranged like a patchwork all over the air. Particles are dandelion fluff floating in the atmosphere. As the fluff moves through space, it samples minute irregular wind pressures (noise values) that are set at the coordinates at that moment, ``a little to the right, a little to the upper left.'' This creates a highly organic and realistic natural visual that does not just move straight forward, but instead undulates and floats lively, as if at the mercy of atmospheric convection.
Illustration: Noise Field (Noise Field) in Japanese notation
Detailed mechanism and operating principle
VFX Place the "Turbulence" and "Vector Noise" nodes in the Graph, define a 3D noise field in space, and add a minute irregular vector force according to the particle's position coordinates every frame to make it undulate.