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3d_model.md

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 # 3D Model
 
-In the world of [computers](computer.md) (especially in [computer graphics](graphics.md), but also in physics simulations, 3D printing etc.) 3D model is a representation of a [three dimensional](3d.md) object, for example of a [real life](irl.md) object such as a car, [tree](tree.md) or a [dog](dog.md), but also possibly something more abstract like a [fractal](fractal.md) or [function](function.md) plot surface. 3D models can be displayed using various [3D rendering](3d_rendering.md) techniques and are used mostly to simulate [real world](real_world.md) on computers (e.g. [games](game.md)), as real world is, as we know, three dimensional. 3D models can be created in several ways, e.g. manually with 3D modeling software (such as [Blender](blender.md)) by 3D [artists](art.md), by 3D scanning real world objects, or automatically by [procedural generation](procgen.md).
+In the world of [computers](computer.md) (above all in [computer graphics](graphics.md), but also in physics simulations, 3D printing etc.) 3D model is a representation of a [three dimensional](3d.md) object, for example of a [real life](irl.md) object such as a car, [tree](tree.md) or a [dog](dog.md), but also possibly something more abstract like a [fractal](fractal.md) or [function](function.md) plot surface. 3D models can be displayed using various [3D rendering](3d_rendering.md) techniques and are used mostly to simulate [real world](real_world.md) on computers (e.g. [games](game.md)), as real world is, as we know, three dimensional. 3D models can be created in several ways, e.g. manually with 3D modeling software (such as [Blender](blender.md)) by 3D [artists](art.md), by 3D scanning real world objects, or automatically by [procedural generation](procgen.md).
 
 There is a plethora of different 3D model types, the topic is very large when viewed in its whole scope because 3D models can be used and represented in many ways (and everything is yet more complex by dealing with different methods of 3D rendering) -- the **mainstream "game" 3D models** that most people are used to seeing are polygonal (basically made of triangles) boundary-representation (recording only surface, not volume) [textured](texture.md) (with "pictures" on their surface) 3D models, but be aware that many different ways of representation are possible and in common use by the industry, for example various volume representations, [voxel](voxel.md) models, [point clouds](point_cloud.md), [implicit surfaces](implicit_surface.md), [spline](spline.md) surfaces, [constructive solid geometry](csg.md), [wireframe](wireframe.md) etc. Models may also bear additional extra information and features, e.g. material, bone rigs for animation, animation key frames, density information, [LODs](lod.md), even [scripts](scripting.md) and so on.
 
-**3D formats**: situation here is not as simple as it is with images or audio, but there are a few formats that in practice will suffice for most of your models. Firstly the most [KISS](kiss.md) one is (Wavefront) **obj** -- this is supported by almost every 3D software, it's a text format that's easy to parse and it's even human readable and editable; obj supports most things you will ever need like UV maps and normals, and you can [hack](hack.md) it even for a primitive keyframe animation. So if you can, use obj as your first choice. If you need something a little more advanced, use **COLLADA** (.dae extension) -- this is a bit more [bloated](bloat.md) than obj as it's an [XML](xml.md), but it's still human readable and has more features, for example skeletal animation, instancing, model hierarchy and so on. Another noteworthy format is e.g. [stl](stl.md) used a lot in 3D printing. For other than polygonal models you may have to search a bit or just represent your model in some sane way, for example heightmap is naturally saved as a grayscale image, voxel model may be saved in some dead simple text format and so on. Also be always sure to **distribute your model in universal format**, i.e. don't just share Blender's project file or anything like that, that's like sharing pictures in Photoshop format or sending someone a Word document, only retards do that -- yes, you should also share the project file if possible, but it's more important to release the model in a widely supported, [future proof](future_proof.md) and non discriminating format.
+**3D formats**: situation here is not as simple as it is with images or audio, but there are a few formats that in practice will suffice for most of your models. Firstly the most [KISS](kiss.md) one is (Wavefront) **obj** -- this is supported by almost every 3D software, it's a text format that's easy to parse and it's even human readable and editable; obj supports most things you will ever need like UV maps and normals, and you can [hack](hack.md) it even for a primitive keyframe animation. So if you can, use obj as your first choice. If you need something a little more advanced, use **COLLADA** (.dae extension) -- this is a bit more [bloated](bloat.md) than obj as it's an [XML](xml.md), but it's still human readable and has more features, for example skeletal animation, instancing, model hierarchy and so on. Another noteworthy format is let's say [STL](stl.md), seen a lot in 3D printing. For other than polygonal models you may have to search a bit or just represent your model in some sane way, for example heightmap is naturally saved as a grayscale image, voxel model may be saved in some dead simple text format and so on. Also be always sure to **distribute your model in universal format**, i.e. don't just share Blender's project file or anything like that, that's like sharing pictures in Photoshop format or sending someone a Word document, only retards do that -- yes, you should also share the project file if possible, but it's more important to release the model in a widely supported, [future proof](future_proof.md) and non discriminating format.
 
 Let's now take a closer look at a basic classification of 3D models (we only mention the important categories, this is not an exhaustive list):