# Questions tagged [noise]

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### Help with making biomes and cities with procedural generation

I'm working on a game in Unreal Engine 5 with Blueprints and the Fast Noise plugin. I've been having trouble getting the biomes and cities set up. I'm not fully sure how to make the biomes affect the ...
• 1
491 views

### How To Make Seamless Custom CubeMap?

I'm currently working on a Three.js project, and I'm aiming to create a seamless cube map. To achieve this, I created six planes and assembled them into a cube. Then, I utilized a shader to generate ...
1 vote
139 views

### How to fix diamond artefacts in diamond square algorithm?

I'm trying to implement the Diamond Square Algorithm. In order to do this I'm following this tutorial: Diamond Square | Procedural Generation | Game Development Tutorial I store the height values into ...
• 51
102 views

### Generating Coherent Noise for the Hyperbolic Plane

I've been doing research on game development in a hyperbolic plane, and cannot seem to find any solution for generating coherent noise. Generating noise for a spherical geometry would be easy -- just ...
• 121
1k views

### How to remove flickering white pixels/fireflies from Unreal Engine render

I'm currently rendering an archviz scene in UE5.1 lit by lumen, but I'm struggling to remove these pesky over-bright pixels on areas which are very reflective or metallic: I have tried turning off ...
729 views

### Assign biomes to areas with a Voronoi noise function

I've created this terrain based on a Voronoi noise function: This is how it looks without the elevation: I want to assign biomes to the polygons following certain rules and use the slope on the ...
• 5
1 vote
605 views

### Generating consistent terrain chunks with unpredictable per-chunk seeds

I am working on an automatically generated (theoretically) infinite 2D world. The grid would be separated in chunks made of thousands of world tiles. We plan to use a Perlin noise function to generate ...
• 113
940 views

### How can I increase the amount of peaks in Perlin noise without decreasing sampling frequency?

I'm generating my game's map using Perlin noise. It's an infinite 2D world with terrain data loaded on demand. I'm using Perlin noise to generate terrain. However, I've noticed that the Perlin noise ...
• 477
369 views

### 2D side-scroller game : smooth noise transition between biomes

I'm creating a little terraria-like 2D side-scroller game with TypeScript. Currently, I divide parts of the world into biomes, which each have their own properties (flat, mountainous terrain, etc.). I ...
236 views

### Random 100x100 map using all levels from 1 to 100

I'm developing a game where players walk though a 100x100 grid of different rooms. Each room has a level associated with it starting from lvl 1 to lvl 100. The map is divided into 10x10 areas and in ...
203 views

### Diagonal discontinuity in perlin noise terrain

I'm using Bilinear filtering to interpolate perlin-noise based height data. However, when I render the resulting plane mesh, there is this obvious diagonal discontinuity in the generated terrain. See ...
• 386
1 vote
160 views

### How do I smooth out the edges at the end of the threshold on noise?

I'm making a terrain generator for a game and I need it to smooth down to a float, I've tried a bunch of different things with lerping but I can't figure it out. I need to stop this from happening by ...
894 views

### How can I create a six sided tillable perlin noise image?

I'm attempting to create a tillable hex shaped terrain map using c++. As part of the process I'd like to use perlin noise, but it seems that in order to make it tillable I'll need to generate it 5 ...
• 103
1k views

### Need to generate seamless gradient noise texture for water Shader [duplicate]

I need to generate something like this for my water Shader, because on fly calculations are to expensive for mobile (https://docs.unity3d.com/Packages/[email protected]/manual/Gradient-Noise-...
442 views

### Generating noise heightmap in C# Console

I want to generate a heightmap for a 2D world (top-down, not a side-scroller), I've followed a guide that worked fine in Unity but in my current project which is a C# console application it doesn't ...
1 vote
3k views

### How do you generate seamless Perlin noise?

I've done a research and tried implementing for months, but I've gotten nowhere trying to make seamless/tileable Perlin noise. Here is my current Perlin noise file without seamless implementation. In ...
• 13
102 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. ...
• 1,055
1 vote
180 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): ...
551 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 ...
• 3,729
1 vote
184 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 ...
• 3,729
110 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 ...
3k 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 ...
• 103
1 vote
602 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 ...
126 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. ...
826 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 ...
3k 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 ...
• 163
265 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 ...
• 289
1k 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 ...
915 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 ...
• 136
3k 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 ...
• 363
1k 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" ...
1 vote
2k 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 ...
• 13
3k 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, ...
173 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): ...
221 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 ...
1k 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 ...
1k 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. ...
• 49
4k 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 ...
• 305
200 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 ...
• 305
755 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 ...
• 305
652 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 ...
2k 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: ...
• 71
894 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
1k 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 ...
• 71
343 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 ...
• 935
1k 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 ...
• 43
1 vote
311 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 ...
• 13
1 vote
642 views

### GLSL: Noise via texture

I am trying to access a texture in a fragment shader to overlay this texture over a certain area. ...
• 465