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MineClone2/MODELS.md
teknomunk b582afeb1f Update documentation for Minetest rename to Luanti (#4706) 
This updates the VoxeLibre documentation by replacing "Minetest" with "Luanti" and updating links.

Done:
* Update "Minetest" in documentation and comments to "Luanti"
* Update links to forums, ContentDB and Luanti project web page

Reviewed-on: https://git.minetest.land/VoxeLibre/VoxeLibre/pulls/4706
Reviewed-by: the-real-herowl <the-real-herowl@noreply.git.minetest.land>
Co-authored-by: teknomunk <teknomunk@protonmail.com>
Co-committed-by: teknomunk <teknomunk@protonmail.com>
2024-11-28 20:55:48 +01:00

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Models in Luanti/VoxeLibre

Models are an important part of all entities & unique nodes in VoxeLibre. They provide a 3 dimensional map of an object for which textures are then applied to. This document is for modders, it quickly highlights some important information for the software needed to open models in VoxeLibre.

Luanti Wiki

For more detailed information on actually using blender to create and modify models for Luanti/VoxeLibre, please visit the Luanti wiki's page on using Blender Here

Recommended software

Blender

Blender is a very popular and free modeling software supported on Windows, MacOS, and most Linux distributions. It is recommended to use Blender to create and modify 3D models within the Luanti engine.

Download blender Here

.b3d addon for blender

Blitz 3D (.b3d) Is one of the main animated model formats used for entities in the Luanti engine. It cannot be imported to blender without a plugin called "Import-Export:Bitz 3D format (.b3d)".

The most up to date version of this Blender plugin can be downloaded Here

Types of model formats

Animated, skinned models

  • Blitz 3D files (.b3d)

  • Microsoft DirectX (.x) (binary & text, compression is not supported)

Static meshes

  • Wavefront OBJ (.obj)

Note: The sometimes accompanying .mtl files are not supported and can safely be deleted.

Note: Do not use .b3d and .x files for static meshes at the moment, Luanti currently spawns animated mesh scene nodes for these, which may result in reduced performance.

Supported texture formats

  • .png

  • .jpg

  • .bmp (deprecated, please use .png or .jpg)

  • .tga (deprecated, please use .png or .jpg)

Note: Any formats not mentioned above but known to work in the past were removed in 5.5.0 and aren't supported anymore.

Pros & Cons of .b3d vs .x

B3D

  • [+] Binary format means a small size

  • [-] Difficult to postprocess after exporting

  • [-] Difficult to debug problems

X (text version)

  • [+] Can be parsed easily with lua scripts

  • [+] Can be easily generated by scripts

  • [+] Easy to debug issues (you can just read it)

  • [+] Can be optimized by quantizing some data

  • [-] Blender exporter is kinda buggy and inefficient

  • [-] Probably still bigger than an equivalent .b3d

Note: Avoid using the binary X format! It's actually just a tokenized version of the ASCII representation, and may actually be less efficient than a sufficiently optimized text .x file!