Questions tagged [blender]

Questions about the use of Blender, the open source 3D modelling software, in the context of game development. Questions involving issues strictly with Blender itself (e.g. modeling) are off-topic here and must be posted on the relevant Stack Exchange site, Blender.SE.

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How do modern game engines achieve real-time rendering vs Blender's "slow" rendering?

I'm new to both gamedev and Blender, and there's something I can't shake: In Blender, a single render (even using the more advanced Cycles renderer) can take up to 45 seconds on my machine. But ...
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  • 1,055
31 votes
2 answers
309k views

How to merge two objects in Blender

What I've Done I created a Cube object with Subdivision Surface modifier in order to model a spehere. I created a cuboid object looking like a angled, longish baton. What I Want to Do I want to ...
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  • 473
28 votes
4 answers
66k views

How can I include vertex color information in .OBJ files?

The .obj files I export are missing data for vertex colors. Is there a way to include color information in the .obj file? If not, what are the alternatives?
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21 votes
3 answers
7k views

How can I create a stretchy, breakable pizza cheese material?

I want to create realistic pizza and allow user interact with it. What I want: What I created: I created model of the pizza (8 pieces) in Blender, then imported it into Unity. The piece of pizza ...
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20 votes
2 answers
3k views

Faking a 3D object to decrease number of polygons

I'm making a game in unity and I'm building a fence in blender but I want it to be as low poly as possible. My original design was too high poly so I thought, what if I could simply use a cube with ...
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19 votes
7 answers
6k views

Blender For Game Development, Pros And Cons [closed]

Blender is one of those applications that you either love or hate. I know it is great for 3D modeling and and animations and there is a lot said about the UI and its steep learning curve. I am more ...
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14 votes
4 answers
27k views

How to load 3D models into Java?

Using LWJGL what is the easiest way to load a 3D model to be drawn on screen? I know LWJGL doesn't have built in loading support so I am looking for a small library that would help to load ...
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  • 499
14 votes
1 answer
4k views

How do you add equipment to a 3D character model using XNA/Blender?

I've watched quite a few Blender tutorials, but I have yet to see examples of how to swap out sub-models. So my question is, how do you swap out equipment on a character model? Specifically I’d like ...
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  • 243
11 votes
3 answers
10k views

Exporting Blender bones

I wrote an exporter for blender models that works great for meshes. I'm attempting to extend that to bones defined in blender. However I haven't found good information for exporting bone data. How can ...
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  • 72.7k
11 votes
2 answers
2k views

Export Blender 2.59 models with animations to XNA 4

Whats the best way to export from Blender 2.59 for XNA 4? I have heard you can use the DirectX to export to .x instead of .fbx which works better with animations? Unfortunately all the tutorials out ...
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  • 619
10 votes
5 answers
19k views

Changing coordinate system from Z-up to Y-up

Blender's coordinate system is different from what I'm used to, in that Z points upwards instead of Y. What would be the simplest way of converting all the world data (so that all animations, texture ...
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  • 7,773
10 votes
2 answers
6k views

Blender - baking normal map - weird colors

I have a metal drum mesh, and when I bake its normal map, I get the weird colors (see attached pic). I'm talking about the horizontal gradient shift of color. There's no deformation like that on my ...
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10 votes
2 answers
3k views

Rendering characters, with cut off limbs (Blender models in Java/OpenGL)

What aspects should I take into consideration for creating character animation and rendering classes if I want to be able to have detachable limbs? I've developed a detailed body system that can have ...
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9 votes
2 answers
489 views

What are the disadvantages of marking every edge as a seam when unwrapping a mesh?

I'm a programmer who's trying to learn a little basic 3D modelling. I'm reasonably comfortable with basic geometry modelling, and can unwrap and texture simple models. But I have a question... When ...
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  • 193
9 votes
2 answers
601 views

Why doesn't light continuous on my model?

I created a basic textured cube model with Blender to practice modeling, and then I imported it into Unity. After I put up some lighting it looks pretty ugly. The light is not continuous on a row of ...
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  • 812
9 votes
3 answers
48k views

Blender: How to "meshify" an object I made from Bezier curves

I made a star shape using Bezier curves, and extruded it (see pic below): What I want to do is give it a rounder look - not just around the edges by using beveling. I want it to kind of look like ...
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  • 205
8 votes
3 answers
10k views

Left-Hand and Right-Hand Coordinate Systems

In Blender and other 3D modeling tools, the coordinate system is right-handed, while in Unity 3D and Orbiter Space Flight Simulator, they are left-handed, why this could happen? Why they don't simply ...
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  • 1,030
8 votes
4 answers
12k views

How do I fix this weird lighting problem?

I'm making a small game in Unity, and some models are displaying very ugly shading. The shading usually looks funky along the edges between triangles. I'm pretty new to working in 3D; I bet this is ...
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8 votes
2 answers
4k views

Animation workflow between Blender and Mecanim

I've recently started learning Unity. Not being able to add custom animations to the standard FBXs you get from Unity's app store is really really slowing me down. When I import one into Blender, it ...
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  • 256
8 votes
2 answers
3k views

How do I apply skeletal animation from a .x (Direct X) file?

Using the .x format to export a model from Blender, I can load a mesh, armature and animation. I have no problems generating the mesh and viewing models in game. Additionally, I have animations and ...
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  • 72.7k
7 votes
2 answers
13k views

How can I prevent seams from showing up on objects using lower mipmap levels?

Disclaimer: kindly right click on the images and open them separately so that they're at full size, as there are fine details which don't show up otherwise. Thank you. I made a simple Blender model, ...
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7 votes
1 answer
60k views

How can I see the height of an object within Blender?

I'm fairly new to Blender. I know there is the "Transform" section in the Object menu of the Properties tab, which contains Location/Rotation/Scale of a selected object. What I'd like to know is if ...
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  • 197
7 votes
2 answers
5k views

Blender multiple animations and Collada export

Say I have a simple mesh in Blender, with two keyframes, like so: Then, another animation for the same mesh, also with two keyframes: Theese animations worke fine in Blender and I can switch between ...
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7 votes
1 answer
684 views

Unity: Why do my normals flip during an animation?

This problem boggles my mind. I have an animation running on a face object (imported from Blender). At a few points in the animation, the normals switch direction! It causes the mesh to blink. Of ...
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  • 71
6 votes
1 answer
16k views

Blender - exporting .obj with texture coords

I'm writing a game which uses obj files. I created an object in blender and I applied texture without UV coordinates and my question is: how to export this object to obj file, but with texture ...
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  • 417
6 votes
1 answer
11k views

How do I find rotation in 3D based on a vector/normal?

I've been playing with Blender and Python, doing basic things like accessing vertices/normals,etc. I can get the normal of each face of a mesh. I was wondering, how can I get the rotation of a face ...
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6 votes
2 answers
14k views

Is it possible to export a simulation (animation) from Blender to Unity?

I created an explosion animation within Blender, something as shown in this video. To achieve this I used a particle-system, together with the "Explode" modifier. This kind of animation (simulation) ...
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6 votes
2 answers
3k views

How to animate a model in WebGL?

I created a human model in Blender, exported the vertices and indices into a JSON file and render the model in a browser using WebGL. Now I created a walk and jump animation in Blender and would like ...
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  • 161
6 votes
2 answers
3k views

Sketchup for modelling, Blender for lightmaps, rendering in Xna Reach profile?

This question moved from https://stackoverflow.com/questions/4319183/sketchup-for-modelling-blender-for-lightmaps-rendering-in-xna-reach-profile Hello. I'm a programmer looking to add some 3D assets ...
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6 votes
1 answer
2k views

exporting bind and keyframe bone poses from blender to use in OpenGL

EDIT: I decided to reformulate the question in much simpler terms to see if someone can give me a hand with this. Basically, I'm exporting meshes, skeletons and actions from blender into an engine ...
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6 votes
1 answer
1k views

How can I get my meshes to work with Bullet Physics?

The problem is that I'm trying to use my meshes with Bullet Physics for the collision part of my game. When I attempted doing this method with my GLM(model loading library by nate robins) model, I ...
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6 votes
3 answers
1k views

Blender assets management and workflow for Unity project

I'm trying to decide how to manage my 3D assets, and even how I should construct a world for my game. I should maybe explain, my game is basically a single explorable world set in a school. It's ...
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5 votes
2 answers
1k views

Replacing a custom 3D model format with something more standard

This is long, so the short question is: What's the best/right/standard set of technologies for creating 3D models and incorporating them into a game such that the complexity for the artist is kept to ...
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  • 163
5 votes
3 answers
3k views

What is the simplest way to export a bezier curve created in Blender to a text file?

I have created a bezier curve in Blender. I'd like to export this curve to a text file. ...
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  • 3,132
5 votes
1 answer
5k views

How to correctly export UV coordinates from Blender

Alright, so I'm just now getting around to texturing some assets. After much trial and error I feel I'm pretty good at UV unwrapping now and my work looks good in Blender. However, either I'm using ...
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5 votes
1 answer
430 views

How can I generate a 3d model via a series of transforms?

Is it possible to generate 3D models using some sort of object transformation (like it's shown here), using PovRay or any other tool, and import them into Blender / Unity? For example starting with a ...
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  • 270
5 votes
1 answer
1k views

Importing materials from blender to UE4

So my problem is that I have a nice green glass material in blender which I imported to UE4 (4.8.1) but in the editor the material was just a simple green colour. I have no idea what I should do to ...
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5 votes
1 answer
1k views

Animation of moving circle by square's outer surface

I want to make this animation in OpenGL, here I attached a simple gif how I want it to looks like: Main problem is that I can not figure out how to move by corner - circle should smoothly move by ...
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  • 51
5 votes
1 answer
475 views

apply non-hierarchial transforms to hierarchial skeleton?

I use Blender3D, but the answer might not API-exclusive. I have some matrices I need to assign to PoseBones. The resulting pose looks fine when there is no bone hierarchy (parenting) and messed up ...
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5 votes
1 answer
874 views

importing animations in Blender, weird rotations/locations

This is for the Blender 2.6 API. There are two problems: 1. When I import a single animation frame from my animation file to Blender, all bones look fine. But when I import multiple (all of the ...
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5 votes
2 answers
931 views

unity / blender -- positioning items / clothes on character

I'm aware that in Unity, when you want to add (e.g.) a weapon to a character, you parent it to the "hand" bone of the character etc... Well I'm trying to add a hat to a character in unity when it's ...
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5 votes
5 answers
5k views

Seams between tiled textured cubes

I've created a textured cube in Blender, which I have uv-mapped like this: The tiles are 256x256, and I've mapped the coordinates exactly at the edges (e.g. x: 256, y: 512). I then export my model as ...
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5 votes
0 answers
540 views

Blender - creating bones from transform matrices [closed]

Notice: this is for the Blender 2.5/2.6 API. Back in the old days in the Blender 2.4 API, you could easily create a bone from a transform matrix in your 3d file as EditBones had an attribute named "...
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4 votes
3 answers
4k views

Why even use shaders?

assuming I want my game to have a Cel-shaded look. There are plenty of tutorials how to implement Cel-shading in hlsl f.e. But what is the point? If I am creating my assets with Blender or 3d-max I ...
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4 votes
1 answer
9k views

How can I calculate the bounding box of a 3D model?

I am making a game in OpenGL and Blender and trying to use JBullet as the collision manager. I am using BoxShapes for collisions, which requires a ...
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4 votes
1 answer
1k views

Can't export Blender model for use in jMonkeyEngine SDK

I have a scene rendered in blender called "civ1.blend" which contains multiple materials (for example, I have one called "white"). I want to use this model in jMonkeyEngine, so I used the OGRE ...
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4 votes
1 answer
4k views

How can I load .FBX files?

I am looking into options for the model assets for my game. I have gotten pretty good with Blender, and want to use C++/DirectX9 (don't need all the excess from 10+), but Blender 2.6 exports .fbx not ....
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  • 1,173
4 votes
1 answer
1k views

Unity - Small holes of light seems to go through my blender mesh

So, I am currently working on a low-poly terrain in Blender which will be flat-shaded in Unity. It all works great, however I am working on a cave for the terrain, and I seem to be getting these small ...
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4 votes
2 answers
2k views

Recommended method for XML level loading in XNA

I want to use Blender as my level designer tool for an XNA game. Using an existing plugin, I can export my levels to DotScene format which is basically an xml file like this one: ...
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4 votes
1 answer
1k views

What is the performance impact of rendering a larger quad?

Lets say I have two planes and I textured them in blender with a 512*512 tiled texture. One plane is bigger than the other (for example, one plane tiles the texture ...
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