Questions tagged [voxels]

VOlumetric piXEL (volumetric picture element). A way to store volume data as a regular grid of values. This tag should be used on questions relating to voxels.

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Design pattern for world objects caching

I'm developing in Unity a voxel-generated terrain and I'm trying to find an extensible design pattern for voxels and more in general, world objects caching. E.g. storing in a 'ChunkCache' class only ...
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How can I stream only the visible layer of objects?

So I've ported a terrain generator to SA:MP (a GTA:SA mod that connects you to players around the world). The terrain is generated perfectly, after only a few hours of scripting. I was surprised how ...
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How to convert an octree to a polygon mesh?

So if I have dynamic voxel terrain data stored in an octree representation what would be the best way to go about converting the octree to a polygon mesh which I can render with OpenGL? A lot of ...
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Voxel Game - Lag when camera is inside of the terrain

I am making a voxel game in OpenGL and I currently render 8 x 8 chunks to the screen. The first thing I do is generate the map using Simplex Noise and this is done once when the chunk is created. I ...
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252 views

How to smooth low-res sampling of noise for voxel terrain

I am attempting to create a new terrain generator as part of a minecraft mod, which works very well if it samples at the full terrain resolution (16x256x16 voxels per terrain chunk). This is extremely ...
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How can I create hemisphere worlds (floating islands?) with 3d (or 2d)? Noise (Perlin/OpenSimplex)

I've been experimenting with noise for a while and I've gotten some terrain up: It looks like this: What I'd like instead is to have planets like this (currently mine is in a cube shape) My ...
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251 views

How do I implement dynamic objects in a voxel engine?

I am writing my own voxel engine, based on cubes of different sizes and properties. In order to store and efficiently use voxels, I implemented Sparse Voxel Octree storage, but I plan to have many ...
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2k views

How do I implement a sparse voxel octree?

I've been working on a voxel engine and I want to implement sparse voxel storage. As I understand it, it works a bit differently from a regular octree and has some neat performance increasing "tricks"....
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598 views

Actual use of sparse voxel octrees in a game engine

Looking for different ways to speed up my simple voxel system reducing the number of voxels and generated triangles, I stumbled upon these sparse voxel octrees. Now, I read a lot about it: how do they ...
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70 views

How to use transvoxel cell cache with octree structure?

I have been implementing Transvoxel in to my Marching Cubes project in c++. The Transvoxel documentation and available code examples feature cell vertex reuse (caching) via indices. The main benefits ...
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What voxel rendering technique is used in Build engine games and how can I replicate that in another engine such as Unity or Godot?

Most information on voxel rendering is focused on heightmaps, but with my current understanding I dont see how one could achieve details like holes using a heightmap. In the below photo: details such ...
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29 views

Changing block shape to blend with adjacent blocks

I am in the process of programming a Minecraft like game in Unity. I am currently implementing the block mechanics. My goal is that when a block is placed, it has an effect on its neighboring blocks ...
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Unreal Engine Procedural Mesh causing crash when rendering chunk size too large

Hey guys im pretty new to unreal but id consider myself a fairly advanced programmer. Im really stuck on rendering my chunks for my voxel game. The implementation is pretty simple and everything works ...
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Fast Occlusion Discovery in 3D Point Cloud

I am trying to find occluded objects given a view point at x,y,z in the scene. For instance in the example below all the points constructing trees should be ...
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47 views

How to search through large numbers of discrete objects that interact with each other, like Minecraft blocks?

Imagine you had a world like Minecraft, but wanted to bake in some sort of physics (okay, I was playing minetest actually). For example, blocks under too much pressure might break, limiting how many ...
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254 views

How to make effective permament rubble in a voxel game made in Unity3D?

I'm working on a semi-voxel game, and I already optimized the voxel structures' meshes by combining and chunking them. When I destroy a voxel, I spawn a low poly voxel fragment, with a rigidbody and ...
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218 views

Throwing away inner faces of cubes of a transparent voxel structure in Unity3D?

I want to create a "Building site is (not) obstructed." indicator for my building system. How can I throw away those faces which would be hidden if the material would be opaque?
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How to use array texture as a replacement for a texture atlas given thousands of block types in minecraft style game?

I've been trying to figure out how texture atlassing works, only to see people say that you shouldn't do it, and instead use array textures (provided you can target people with that capability, which ...
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362 views

How to efficiently batch blocks and reduce drawcalls in a voxel-like game

To fully get the benefits of GPU instancing in Unity in a voxel-like game I'm trying to batch as many static blocks as possible (the terrain won't be destructible, and I can't set these blocks to '...
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669 views

1D vs 2D vs 3D texture performance

I'm working on a 3D game with large blocky untextured, but individually colored, voxels (similar to CubeWorld). For rendering, right now I naively convert online all visible faces ahead of time to ...
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532 views

2D Voxel isometric rendering with non grid-aligned objects

I'm currently working on making a simple SDL2 game (written in C++) where the maps are comprised of sprite voxels (essentially just a png of an isometric cube). Game entities move in 3D space. The ...
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137 views

Rendering blocks in lwjgl, problems with VAO & VBO

//EDIT: Found the solution: had to use GL11.glDrawElements instead of DrawArrays. I'm working on a "voxel based world" engine. At the moment my approach follows these steps: Creation of a Mesh: ...
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427 views

How to set a specific face's texture color in Unity?

First off, let me describe my situation... So I'm building a voxel engine based on this tutorial. I'm using my own texture tilesheet. Most of the tiles have their own color except grass, leaves, and a ...
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313 views

Creating a voxel chunk with a VBO - How to translate the coordinates of each block and add it to the VBO chunk?

I'm trying to make a voxel engine similar to minecraft as a little learning experience and a way to learn some opengl. I have created a chunk class and I want to put all of the vertices for the whole ...
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905 views

Alternatives to voxel-based terrain

Are there any alternatives to voxel based terrains? Such terrain should be fully destructable, allow for arches, overhangs, preserve sharp features where needed and keep consistent topology. Maybe ...
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191 views

How calculate a new node after cutting a node into an octree

I'm working on a small XNA game, voxel-based like minecraft. I've recently faced a problem in how to delete a node (cube) from an octree and re-calculate the new octree afterward. I have already ...
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39 views

How to calculate ray unit grid intersections?

P is ray origin, D direction. How do I calculate tx, ty(s)? This is for octree raycast. The primary goal is to get 1st intersection voxel (v) then second (v") and so on.
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Get direction vector of camera in voxel game

I am currently working on a Minecraft clone (a voxel game). The feature I'm working on is the ability to break blocks. I have a ray-casting/ray tracing algorithm for traversing the voxels, but the ...
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55 views

Octree LOD without traversing the entire tree

I am working on a voxel engine that uses a huge Hashed Linear Octree that reconfigures when you move. Each octree leaf is a voxel. The world is procedurally generated using 2D Perlin noise. The octree ...
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78 views

Benefit of storing chunks as Octree leafs vs single block as Octree leaf

I saw many voxel game developers opt for a strategy that involves using an octree whose leaf nodes include a 16x16x16 (or 32^3 or 64^3) chunk instead of having leafs represent a single voxel. What is ...
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242 views

Voxel River Generation at Biome Borders or Biome Blending

I'm creating a voxel (block, Minecraft like) game and I have different biomes (flatland, mountains, ect) and the problem is they are abrupt changes when biomes end /begin. I'm using 3d perlin noise, ...
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1answer
371 views

Setting vertex colors for a marching cubes mesh

I am making a voxel based terrain system (Yes, I know, very original...), anyway... Each voxel should have it's own color so the player can distinguish which type of material it is. For example: dirt ...
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442 views

UV unwrapping and texturing for a voxel terrain

As sugested by another kind user, I started using MagicaVoxel to create the scenery for my game (which is in the 2.5D style of Pokémon Gen 5 or Octopath Traveler). I managed to import the test object ...
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Converting a multidimensional array to a distance field

I've been working (as so many others before me have) on a small Voxel-type game prototype. So far, i have a 3d array (16 by 16 by 255 elements) that contains block ids - and as of right now, 0 means "...
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Inclusive vs Exclusive voxel bounding box

Let's say I have a few voxel at (1,1,1) and (2,2,2), I would like to know if would be better to consider that the smallest box that contains both voxels is either (1,1,1) to (2,2,2) or (1,1,1) to (3,3,...
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Check whether an object is fully inside/overlapped by other objects in Unity3D?

I have structures made of voxels (cube gameobjects), and I want to make complex structures from them. But I don't always want to place them on the grid. I want them to be more realistic, like ...
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44 views

How can I diminish my voxel terrain's height smoothly instead of randomly?

I have a script that is supposed to diminish height smoothly when an int is lowered, I tried perlin noise to make it lower like it would if it where terrain, which is the goal I'm after, but it only ...
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384 views

Voxel terrain generation performance problems

I am trying to create a minecraft clone to practice some stuff in Unity including Raycasting, terrain generation and player controlls. Terrain is generating without any problem with a perlinNoise. My ...
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1k views

Greedy Meshing : Slow to rebuild when updating chunk

I've a problem with my voxel based game. The game is sliced into chunks (Like Minecraft), each chunk is 16x256x16 blocks. When I started the project, I used a basic culling system when hidden blocks ...
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338 views

XNA 4.0 C# How to draw cube with the index method

EDIT NOTE: I was trying to impliment indexing to my code instead of instancing. I left the indexing method because in my case, I don't need to use it. Preview Untill now I have drawed my cube with ...
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930 views

Voxel clouds rendering in Unity

I would like to have realistic voxel clouds in Unity game - I found a very promising article on fast fluid simulations, however the the output of the algorithm itself is 3D grid of cloud densities (=...
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86 views

Unity: Combine two UVs by alpha

I'm currently creating a voxel game like Minecraft. To display the damage of blocks, I want to combine the alpha channel of one part of my texture map with the actual texture (like Minecraft does), ...
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133 views

Voxel sparse octrees for indirect illumination

I don't understand the use of voxel sparse octrees for indirect illumination calculations. First of all, what exactly is happing? We're rendering the scene as usual with diffuse lighting. In the ...
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242 views

Texturing Custom Meshes/Terrain?

Here's the scenario: I procedurally generate terrain on the fly, creating an isosurface which is an overlay on top of a scalar field of data points. These underlying data points are basically voxel ...
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1answer
128 views

Storing attributes in static geometry

I have a Minecraft like world where I statically create one instance of each tile type, and then place it around the world. However, I don't know how to actually change individual attributes for each ...
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1answer
204 views

How can we generate terrain using simplex noise 2d with block position vectors

My problem might be special comparing to other questions related to terrain generation using simplex noise 2d. Each chunk contains a table of 1-dimensional array which encompasses the position data( ...
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1answer
1k views

Marching Cubes Chunks

I'm doing some voxel based game, where I want to have voxel planets. I decided to use the marching cubes algorithm, and I successfully created a planet (even with noise) with the following density ...