Questions tagged [noise]
The noise tag has no usage guidance.
34
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38 views
Compute normal based on Voronoi pattern
I am applying a 3D Voronoi pattern on a mesh. Using those loops, I am able to compute the cell position, an id and the distance.
But I would like to compute a normal based on the generated pattern.
...
0
votes
1answer
39 views
Derivatives usage in FBM core
So I learned now about derivatives and fbm, but can not figure out the effect of this code example (credits https://www.iquilezles.org/www/articles/morenoise/morenoise.htm, bottom of page):
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2
votes
1answer
79 views
How to store noise in a GL texture
I find that my procedural simplex noise in my fragment shader hurts performance, so I thought I would just use a stored noise texture instead.
I would like my noise values to have better than 8 bits ...
1
vote
1answer
116 views
Procedurally placing buildings on noise-field
So, I have a procedurally generated planet. In my case it's 3D (hexagon/pentagon globe) but for simplicity let's assume it is a 2D grid.
I have distributed resources over this planet, using Simplex ...
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0answers
30 views
Trying to understand the range of Improved Perlin noise
I've been implementing Improved Perlin Noise for a small library I'm writing. Everything was hunky dory when it was just in the 3rd dimension, but I recently expanded to the 1st, 2nd, and 4th ...
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1answer
179 views
Understanding the “gradient” in Perlin Noise
If I didn't get it wrong from the wikipedia, the word "gradient" should represents either the derivative for continuous functions, or the differential for discrete functions.
To rebuild the original ...
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0answers
70 views
Unity objects with flickering and noisy edges
In our game which is still in early development we're (we, Unity rookies) facing this flickering issue occurring especially in edges which are very close to each other, but not limited to them. The ...
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0answers
12 views
Smoothing noises with different amplitudes (Part 2)
Well, I'm continuing this question without answer (Smoothing random noises with different amplitudes) and I have another question.
I have opted to use the contour/shadow of a shape (https://...
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0answers
65 views
How to generate a dozen biomes
Currently I have Ocean, Desert, Grassland, Mountain, and Snow biomes. These are generated in subtractive layers of noise that prioritizes Low->Mid->High areas using multiple noises around 8km across. ...
0
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1answer
131 views
Perlin Noise Problem with Falloff
I know this might be a bit of a noob question, but I can't figure out what I'm doing wrong, and the math that I have done should make this work correctly. I am trying to make a perlin noise map that ...
6
votes
3answers
1k views
Generate cave like Terrain in 2D
I want to create 2D Terrain randomly. It should look like a connected Cave (Shown below). What is the best method or Algorithm to get similar results?
The important part is the open area(green) and ...
3
votes
1answer
139 views
How do games that generate the world by noise handle physics on the server?
I keep thinking about what it is like to do the physics on the server, so that it is authoritative, and thus avoid cheating, in a game that manages the world by noise, ie the collisors are being ...
5
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4answers
607 views
How to make noise-generated terrain more square?
I use a perlin noise generator to create a map. All works fine and dandy. It uses the following formula:
Generate perlin noise
Posterize the height values to be an integer between 0 and 5.
What I ...
5
votes
1answer
440 views
Perlin Noise unwanted artifacts
I am trying to write a perlin noise class with c++ and sfml, but I am experiencing unwanted visual artifacts in the output. In the image, there are obvious lines being drawn between the points of the ...
8
votes
3answers
1k views
Noisy edges, smoothing out edges between faces via fragment shader
I have a generated terrain, with hexagonal geometry, as per screenshot below:
I then generate biomes, but as you can see the borders between them are really ugly and straight. To hide that hexagonal ...
1
vote
1answer
609 views
How does this hash function work in this perlin noise implementation?
In Perlin's implementation of his noise function, he uses an array to hash the input coordinates and later find the gradient vectors. But in Stefan Gustavson's implementation, a strange "permute" ...
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vote
2answers
999 views
How should I use this 1D perlin noise function?
I'm trying to create a terraria like terrain with SDL2 and C++. For generating the terrain I'm trying to use the 1D noise function from here:
https://github.com/SRombauts/SimplexNoise
It's pretty ...
4
votes
3answers
2k views
How to layer the Worley noise like this?
Recently I'm trying to implement Siggraph15_Schneider_Real-Time_Volumetric_Cloudscapes_of_Horizon_Zero_Dawn, you can also find this in GPU Pro 7, (part II Lighting, ...
0
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1answer
140 views
Got unexpected results from perlin noise. Wondering what it is doing?
I was just messing around with perlin noise and got this. Wondering if anyone knows what it is or has seen it before.
Here is the code(LUA with love2d engine):
...
0
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1answer
153 views
Unwanted line between chunks in heightmap infinite terrain
I can't figure out what is causing the line between my two chunks. They are completely aligned. It must be something to do with the algorithm. I am using lua with the love2d game engine. Here is a ...
0
votes
2answers
663 views
My perlin noise height map doesn't have smooth transitions and goes directly from black to white
I am using lua with the love2d engine to make infinite 2d tiled terrain with perlin noise. This is just the first step and I want to fix the bugs early.
The problem is that there is no gradient ...
4
votes
1answer
660 views
How do I apply domain warping to my marching cubes voxel terrain in Unity?
So, in GPU Gems 3 there is a cool warped terrain that I seek to replicate.
Currently, I'm generating the terrain fine, but I want to add that warp effect.
...
2
votes
1answer
1k views
Simple coherent noise function to use in a GLSL shader
I'm looking for a simple (but especially fast) coherent noise function to use it in a shader written in GLSL.
I don't need it to be excessively smooth or good looking, I just need that it has the ...
0
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1answer
89 views
Perlin noise looks uncoherent on higher z
I was experiencing with my Perlin noise function and I tried to animate a 2D noise by changing the z value of a small amount every frame. However, as z increases, the result becomes stranger and ...
3
votes
1answer
622 views
Unwanted Perlin Noise result
I've finally managed to write a working Lua version of Perlin's improved noise for Love 2D. However, when I run it, i get this:
Which is just fine, I guess. But I would like something that looks more ...
4
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0answers
439 views
How to create a seamless 5D noise function?
I would like to create a seamless 3D Texture, I have read that it's doable with a 5D noise function but I can't find any implementation and the math is over my head here.
How can I create a 5D noise ...
6
votes
4answers
1k views
Smooth 1D terrain generation
So I'm pretty happy with my terrain, and the progress on my game. I just want to figure out why the terrain is so steep sometimes. Right now to generate my random seed I use this:
...
7
votes
3answers
590 views
Why can't I patch my procedural terrain together?
I figured out how to implement a midpoint displacement algorithm to generate a map for my game. I wanted to create an infinitely large world, so I tried to patch two maps together, but they didn't ...
1
vote
1answer
617 views
1D Terrain Generation in Java
Not able to implement Perlin Noise for 1D Random Terrain Generation. I've tried everywhere and I cannot find anything useful, sure I sort of understand Perlin Noise but everytime I try it nothing ...
1
vote
1answer
212 views
Simplex noise heightmap
I'm currently working on a game with an "infinite" programmatically generated terrain.
The terrain is being generated by creating a heightmap using simplex noise.
I've followed a tutorial and ended ...
4
votes
1answer
912 views
How do you add turbulence to a particle system using noise?
I have implemented a basic particle system using transform feedback in openGL, hoping to replicate a dust cloud.
I have looked at methods of adding turbulence, such as vortices found here.
But they ...
1
vote
1answer
230 views
Custom 3D Noise function incorrectly generating in Lua
I have been working on a custom noise generator (not Perlin on Simplex or whatever), which works fine in two dimensional space, but upon converting it into three dimensional space, it turns into a ...
1
vote
1answer
389 views
GLSL: Noise via texture
I am trying to access a texture in a fragment shader to overlay this texture over a certain area.
...
0
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1answer
311 views
How can I render cloud patterns like in these examples?
I have a quick question.
I see in many games, usually in the menu, some moving "clouds" in the background, apparently additive blended into each other, which does a really nice job immersing the ...
