Computer Graphics Stack Exchange
Computer Graphics Stack Exchange

Questions tagged [noise]

For questions about creating or working with noise functions (in 1D, 2D, 3D or more).

44 questions
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benefit of perlin noise over value noise

While investigating the inner workings of perlin noise, I wondered why one would use perlin noise instead of simple value noise. As far as I understand it right, the following applies: Perlin noise is a lattice based noise function, which assigns a…
Timm
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unwanted patterns in simplex noise

I want to create a "river biome" where there are rivers cutting to a flat land mass, to start I wrote a little js to generate a random height map (with simplex noise) but that's where I'm stuck. this is what it generates: as you can see there are…
Sam Apostel
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Why the gradients generated in original Perlin Noise causing axis-aligned clumping?

I am learning Perlin Noise, the original version and the improved version. In the paper which Ken Perlin wrote in 2002. He said "The second deficiency is that whereas the gradients in G are distributed uniformly over a sphere, the cubic grid…
Xile
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Concerning the Procedural noise's function, how would you define a squared magnitude in plain word?

By googling, I have found some definition of squared magnitude about mathematical plane applied in the gaming field, but I am dubting this is what we would mean in the noise generation's field. thanks for any hint
DiaJos
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Confusion on the return value of turbulence of Perlin noise

turbulence function From my understanding, the turbulence in Perlin noise is to accumulate Perlin noise of different frequencies with different weights. Based on this understanding, the return value of turbulences should have the same range of color…
ttzytt
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How to create 2D (directional) noise?

I'm just getting started trying to understand noise generation algorithms. What I'm trying to achieve is to get a 2D (or 3D) grid of random directional vectors (again, 2D or 3D) according to a noise distribution like Perlin, ie. not just a grid of…
kinkersnick
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Perlin Noise, surface deformation NOT along the normal vector

I've a question about surface deformation using Perlin noise or Simplex noise. You can see everywhere on google images how these results look like, if you calculate a 2D / 3D noise and move the surface in normal direction like the image in the…
Thomas
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