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Questions tagged [procedural-generation]

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Custom Create Maps in OpenGL

I am trying to create some procedurally created terrains for which i need to create noise maps. How do I create a texture of noise map in OpenGL and then pass that in my vertex shader as a heightMap? ...
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45 views

What fast algorithms can generate not-realistic but quite handsome animated landscapes?

I was looking for algorithms that quickly compute quite nice realistic, or not realistic, animated landscapes, in video format ("animated" = the camera moves, or the water is animated, etc.) But all I ...
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Is it possible to develop this image generator from randomly redrawn detected edges or am I going straight to the wall?

Aim I would want to procedurally generate totally new images from a set of thousands of images of a given category (simple landscapes for example). Deep-learning won't be used for this purpose. This ...
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86 views

Procedural Generation of 4D Shapes

I'm curious if anyone has any insight into how one might procedurally generate 4D objects, as showcased in Miegakure (or the developer's other game, 4D Toys ). I built a program a while back to do ...
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2answers
81 views

Creating a Smooth 3D Mesh from a 2D Outline

I am trying to find (or maybe create) an algorithm for creating a smooth, rounded 3D mesh given a 2D outline. I'm trying to recreate a system from a Gamecube game called Amazing Island, and you can ...
4
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1answer
72 views

How to approximate the heightmap of processed wood?

In the above image, you can see that there is some slight variation of the height of each wood plank. These variations do NOT come from the wood texture itself, but from the way it was cut, i.e if a ...
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1answer
67 views

Organic 2d tree generation

I'm looking for a code to generate organic 2d trees like thiskind of shapes Gerard Ferrandez has an example to generate some tree but not organic like the picture shape https://codepen.io/ge1doot/pen/...
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0answers
41 views

Help with efficient quadtree vertices indexing to avoid redundancy

I am creating a quad tree from ground zero, because I am going to collapse it from bottom up I am refining it with a certain LoD level. I am using glm for mathematics and opengl for rendering. ...
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0answers
58 views

Evenly distributed point cloud for a grass renderer on a sphere

I'm trying to add some details like grass, rocks, trees, etc. to my little procedurally-generated planet. The meshes for the terrain are created from a spherified cube which is split in chunks (...
2
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1answer
290 views

What might be causing these artifacts in 5D & 6D simplex noise?

I've been working on writing functions for 5 and 6 dimensional simplex noise, working off FastNoise's 4D function as a base. 2D, 3D and 4D noise all follow a very similar and recognizable pattern ...
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3answers
4k views

How to modify Perlin (not simplex) noise to create continental like terrain generation

I have been playing around for a day with Perlin noise, and I am currently stuck. Most of the modifications I have made to the algorithm produce more or less the following: Now, this is a very good ...
3
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1answer
319 views

Help understanding Perlin Noise

I am following this tutorial: Understanding Perlin Noise | Blog To understand Perlin Noise. In particular, right now I am focusing on the following code section: ...
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0answers
99 views

Round Box SDF scaling issue

I am using the Inigo Quilez SDF function to generate a round box shape. The aim is to be able to control the shape scale, smoothness and roundness. I've achieved a pretty good result but I am facing ...
4
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1answer
274 views

procedurally generating a texture overlay simulating shrink wrap

I'm looking for a way to procedurally create a realistically looking texture overlay simulating the object being shrink wrapped. It is only used to be added to single images, so it does not need to ...
5
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1answer
135 views

Correct post-displacement normal calculation (Y-component and epsilon)

I often use a 2D Perlin noise texture to displace a grid in the vertex shader (e.g. terrain, ocean). However, every time I google the method to calculate post-displacement normals there is a slight ...
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1answer
444 views

Benchmark GLSL fragment shader

How can I benchmark a fragment shader? What my shader does is basically lots of floating point operations, since it's doing some procedural stuff.
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0answers
343 views

Why does increasing simplex noise dimension wash it out?

I just tried using this approach to create a tiling 2d simplex noise function with Gustavson's java implementation. The result tiled, but the texture seemed muddy / washed out. I decided to compare ...
5
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1answer
1k views

Creating an “ink spread” effect with a glsl fragment shader

I have dealt with glsl before, but I still have problems with my understanding of how to achieve certain kinds of effects with per-pixel processing. What I am looking to do is use a fragment shader to ...
5
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1answer
213 views

Sine-based Tiled Procedural Bump

I am trying to implement this formula to generate bump but I am facing some issue. The result doesn't look the same it's much darker. Here is my result (without same parameters) but it is much darker ...
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2answers
2k views

What makes a good permutation table?

I'm implementing improved Perlin noise. Its key feature for randomisation is the hardcoded permutation table, which gives essentially random but reproducible gradients at the cells of the grid. The ...
16
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1answer
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 ...
28
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1answer
2k views

Does the original Perlin noise ever have any advantage over Simplex noise?

Perlin noise is one of the most popular procedural noise functions. Perlin later developed Simplex noise which improves on some of the shortcomings of Perlin noise, notably its inefficiency in higher ...