Questions tagged [3d-meshes]

Geometric representations of objects in 3 dimensions. 3D-meshes are made up of a collection of triangles or other polygons, forming volumes and surfaces. They are commonly used for visual representations on computer screens.

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18 views

Unreal Engine - Materials Import as Gray

I imported the .fbx files from here: https://www.cgtrader.com/3d-models/industrial/other/big-warehouse-pack into an Unreal Engine 4.27 project. All the meshes load in properly, but the materials are ...
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32 views

Switching out the mesh of a game object at runtime

I am trying to switch out the mesh of a game object. I have this script: ...
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Is there a way to find out what meshes are supposed to be combined in Assimp?

I'm working on my assimp loader. I know that it has a separate mesh per material. Before I used to simply combine all of them upon import. Now, I want to figure out which meshes are from multi-...
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Unity intersection of mesh renderers on Android

I’m currently developing a game with Unity and ran into a problem while building for Android. The player and obstacles are mesh renderers (for example cubes & boxes). On iOS and the Unity editor, ...
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Pink Objects/Sub-Meshes (NOT MATERIALS)

Using URP. Any object I import into unity from blender (fbx), the sub-mesh that comes with it are pink. All the materials are fine, I can put the object in my scene with a material and it looks normal....
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How to ensure Unity does not rearrange the sub-meshes of a mesh on import?

having a bit of a head scratcher problem here. I have my artist's making multiple unique meshes in Maya that contain 3 materials. Each material is assigned to a sub-mesh in a specific order. This ...
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114 views

How to weld nearby mesh collider vertices together to erase seams in Unity?

I'm using Unity 2020.3.2f1 and I have a very commonly seen problem. I have a Spherecollider which I am using for a physics game, and geometry that uses ...
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How can I detect and hide faces inside an object when combining two or more meshes?

I am trying to make a game where the player can make vehicles out of parts. To apply proper physics to the vehicles, like drag and buoyancy, I would like to get the outer hull of the various parts ...
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54 views

Unity Cutting a hole in mesh

I've set myself a stupid task, that I didn't solve couple years back, again. I've got few meshes with normals pointing inside. Caves. Like mostly circular rooms and tunnels that should connect them. ...
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2answers
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how can I rotate a tetrahedron's vertices so that it's pointing straight up?

I am trying to render an Equilateral triangle in 3D, and I came across this answer: https://math.stackexchange.com/a/562895/15497 So based off of that, I made my vertex points: ...
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How mesh transformation works under the hood

We can look at the most popular engines like Unity and Unreal engine (maybe Godot and other). As far as I understand (at least I would do this), we store the original mesh, and then for every change (...
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Separating part of mesh facing upwards

I really hope you can help me fix this code: ...
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32 views

How to edit a Rigged 3D Model without Ruining the Rig?

I have some rigged 3D models that I want to use. They came as .fbx. and sometimes I want to make some minor edits such as merging/moving/removing some vertices or something of that nature. The Problem:...
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Exported FBX to Monogame doesn't translate all meshes

I'm taking a crack at a minecraft clone in Monogame, and I am trying to get my model to render as it's shown in Blender 2.9.1. When I look at the model in Blender, it looks great. When displaying in ...
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165 views

Best Practices for Texturing Large Objects

Kind of a 3D graphics newbie here. This is the biggest prop I've ever tried to texture, and I'm kind of stumped. How do you get a decent resolution on large meshes like this without exporting ...
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Creating Sphere Triangles from Vertices

I came across a way to create the vertices of a sphere, located here: https://gamedev.stackexchange.com/a/150293/62793 I converted this to the following C# example: ...
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Unity mesh only rendering one set of triangles

I've been using Unity3D to procedurally generate terrain with Perlin Noise and I've come across a problem where the mesh that I've constructed only renders one set of triangles. The following is my ...
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Blender->Unity Import Animation Failing by Overlapping Mesh Objects

I'm new to both Unity and Blender. I created this penguin 3d model, rigged it up and animated it in Blender and all looked good. When I imported it into Unity, I noticed that this idle animation did ...
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Generating a mesh from a set of generatively produced co-ordinates

Using Unity I've been producing sculptural forms that look like this. It's made of patterns of cubes that twist around each other using a flocking algorithm. I'm trying to get it into a 3D printable ...
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1answer
153 views

Half of my tris are textured in streaks and blurs

I have written code to import meshes from OBJs and textures from BMPs. My texture coordinates seem to be getting messed up somehow, or some other issue is occuring, because I am getting these effects ...
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1answer
205 views

How to inflate and deflated an object?

I'm trying to find a way to make an object inflated/deflated in Unity, So I can change parameters via script and control a range of 0-100% inflation. I have seen that there is a way to get this exact ...
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38 views

Update to the ROAM Large Scale Mesh LOD Method

I'm looking to create very large planetary terrain meshes. The most efficient and researched methodology I've seen so far was the ROAM 2.0 Method. However, this was written and published in 2005. Does ...
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2answers
197 views

OpenGL only rendering 4 tris of cube?

I'm on Win10, OpenGL 4.5 I wrote some code that takes mesh data from an OBJ file and puts it into a vertex buffer. I used this code to import a cube OBJ and render it in OpenGL. For some reason, ...
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1answer
41 views

Is there a way to normalize for both ways in Unity?

I have a building, built in blender, that has been imported to Unity. And I flipped every necessary piece and calculated the normals inside in blender. However, since I made the rooms inside the ...
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48 views

Mesh shaded as single pixel

I am trying to procedurally generate planets in Unity. The actual planet is already done, but now I am trying to add clouds. For this I created a PBR-Graph shader that draws the clouds based on some ...
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2answers
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Texturing different block types on an optimized voxel mesh

I have a cubic world (like Minecraft) where I'm generating chunks. In those chunks, only visible vertices and faces are generated. Currently, it means that if I have a 2x2x1 chunk, it will generate 8 ...
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1answer
345 views

Optimizing 3D tile-based geometry

For my game, I have a tool that lets me quickly create map geometry. You can see a (albeit early version) demo of the tool here. The main problem with the tool is that even a semi-large map can EASILY ...
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1answer
45 views

Material looks different on programatically generated mesh compared to resized default cube mesh

I've written some code that generates a mesh from some 2D nodes, generating both triangles and vertices. It seems to have worked pretty well, since I get a solid mesh without any weird rendering ...
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How to load 3D modells when they are necessary

I'm working on a 3D game engine, currently I load ALL of my 3D modells into the memory when my game starts, but obviusly there will be hundreds of 3D modells, so somehow I should unload them when they ...
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2answers
119 views

Objects Imported from Blender to Unreal have really zoomed Materials

I've been learning how to use Blender for UE4. I just started figuring out how to define which sides should have materials on them. In particular, I wanted this building to have different materials ...
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1answer
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When importing a character to Unity, textures and meshes don't appear

I'm relatively new to Unity, and I'm left with doing this as my last step towards my task - importing my animated character to a game engine and program the movements. The problems that I have ...
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3answers
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How does 3D mesh morphing work?

In the Sims 4, you can drag to reshape the face and body when you create a sim. You can see a similar system implemented in this Body Visualizer. How can I implement similar geometry morphing in my ...
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162 views

Procedural mesh comes out black in any shader

I wrote a script that Creates a mesh procedurally ...
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71 views

Performance in unity at runtime (mesh creation) vs (assets bundle loading)

I'd like to load a 3d model that contains several objects in real-time. I believe I have to two methods to do this: create an assets bundle that contains my model (all object) and loaded at runtime. ...
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1answer
275 views

How to apply saturn's ring texture in Unreal Engine 4?

I'm working on a "solar system" model project. And while trying to apply saturn's ring texture which is this one : it ended up looking like this: I'm new to UE4 and this branch in general. So I ...
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1answer
35 views

Algoritm for scaling an 3D model with fixed edges

I am looking for an algorithm that allows me to scale a 3D model with certain fixed edges. For example scaling up a window should have the frame remain a fixed width while the length of the frame ...
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23 views

How to always draw a child mesh in front of its parent mesh

I need to display a gizmo-like mesh at runtime, and it must be always in front of its target mesh. How can I achieve that?
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1answer
353 views

How do you combine multiple meshes into one in Blender?

I need to combine multiple meshes into one in Blender 2.8 (Just make them into a single mesh that looks like all of them in their normal positions). I am doing this mostly for performance improvement ...
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0answers
50 views

How to align edge vertices of modular props snapped on a 2D grid?

For a project I am working on I create some 3D props in Blender that can be put together in a modular way on a 2D grid in Unity. In Unity I generate the grid contents using these props. Now given ...
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1answer
210 views

What program was used in Kojima's Death Stranding to create the 3D scans of people? [closed]

I've been unable to find out what program Hideo Kojima used to create his 3D scans of people in his game Death Stranding and presumably Metal Gear V as well. Here is a video of the scanning in ...
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1answer
287 views

My vertex cache for reusing vertices in marching cubes algorithm in unity fails for one case, but I cant figure out what case

I implemented the marching cubes algorithm in unity and wanted to reuse vertices instead of creating new ones for every triangle. I am looping through a 3D array of points as I generate the mesh in ...
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27 views

Switching between meshes vs Loading only specific mesh

I am currently developing an online multiplayer game on Unity. In the game, the character of each player will be assigned its mesh after the game receives parameters (their meshes' names) for each ...
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1answer
154 views

To split or not to split large 3D objects?

I have a fairly simple question for which I'm seeking guidance: Should large 3D objects be splitted into smaller ones? By wide, I mean an object that would be as wide as a game level is, below is ...
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1answer
160 views

How to cut a 3D mesh like a lathe?

How to simulate the object cutting with a lathe, similar to what's done in the CRAFT: Work VR Shop app?
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1answer
60 views

Flat shaded triangles using the ModelBuilder?

I decided to give the ModelBuilder a try but I cannot get rid of the smoothing of my terrain. So what I tried: Create each triangle individually with there own ...
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1answer
35 views

Comments getting executed as command

I have a script to edit my world on run time and a script to generate a world. When i tried to place a block, something wrong happened, so I tried to make my script into command until I find which ...
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1answer
215 views

NavMesh going in the ground

I'm trying to do a navmesh. Everything seems to work fine exept that my character in almost completely under the ground. The ground is a plane with a mesh collider. I have baked it and checked my ...
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21 views

Destroying cubes in combined mesh at runtime [duplicate]

How could I destroy cubes from a mesh? Once i've combined my cube to a single mesh, would it be possible to be able to destroy one of these cube but to keep a mesh ? Ive seen a video where te person ...
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1answer
177 views

Model gets distorted when rotating the camera

I'm currently developing my own 3d graphics engine and I'm having a hard time figuring out why my 3D models gets distorted when rotating the camera around. This is my projection matrix. I'm following ...
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How to cut a desired shape out of a mesh?

I want the player to be able to cut a hole through a wall, similar to what's shown in this video I know for the fact that it's really difficult to achieve, so I was wondering how I can cut a shape ...

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