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The .vox file format used by MagicaVoxel is a proprietary format for storing voxel-based 3D models. A voxel is a way of constructing 3D space using small cubes—essentially, it's the 3D equivalent of a pixel.

A .vox file has a chunk-based structure that contains information such as model size, voxel coordinates, and color palette. Among these, version 150 is widely supported by many tools.MagicaVoxel is a free voxel art modeling tool designed specifically for creating 3D models. With its simple interface, users can intuitively build 3D objects by stacking cubes. It also offers rich features like coloring, lighting, and rendering, making it easy to create pixel-art-style 3D works. It's widely used in game development and digital art.When using MagicaVoxel .vox files with Three.js, it's important to pay attention to the file version. For example, the sample code shown here uses Three.js version 0.128.0 along with its built-in VOXLoader. However, this loader only supports .vox files saved in version 150 format, which corresponds to MagicaVoxel versions prior to 0.99.6.

Starting with MagicaVoxel 0.99.6 and later, .vox files are saved in version 200 format by default. If you try to load these with the older VOXLoader, you'll likely encounter errors.
To avoid this, you'll need to either convert the file to version 150 or use a loader that supports version 200. Always check the file format and loader compatibility in advance to ensure smooth rendering.