# Questions tagged [noise]

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

6 questions
Filter by
Sorted by
Tagged with
392 views

### Is all grid based noise inevitably anisotropic?

I'm interested in how this applies to higher numbers of dimensions too, but for this question I will focus solely on 2D grids. I know that Perlin noise is not isotropic (direction invariant), and ...
614 views

### Why is it twice as expensive to make a noise function that can be tiled?

I've seen in several places that making Perlin noise loop seamlessly requires calculating it twice in slightly different ways, and summing the two results. This Perlin noise math FAQ gives a formula: ...
3k views

### How can I generate procedural noise on a sphere?

I would like to generate procedural noise on the surface of a sphere (e.g. to procedurally generate planets or marble-textured balls). Of course, I could just take a standard noise algorithm and map ...
3k views

### Why does my Perlin Noise look "blocky"?

I tried to implement Perlin Noise by myself using just the theory (following flafla2.github.io/2014/08/09/perlinnoise.html). Unfortunately I was unable to achieve the look of the "original" Perlin ...
The context of this question is correct dithering of color with gamma correction. In dithering we add (shaped) noise $n$ to a signal $s \in [0, 1]$ based on a random variable $r \in [0, 1]$ s' = s +...