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NSBMD (File Type)

NSBMD (NITRO-SYSTEM Binary Model Data) is a proprietary model format offered by the NITRO-SDK and is used by many DS games.
It is derived from the NITRO-SYSTEM uncompiled model format IMD, which is generated by exporting models from the NITRO-SYSTEM Maya/3DS MAX plugins.
To convert IMD to NSBMD, one should use g3dcvtr (Graphics 3D ConVerTeR), found in the NITRO-SDK package.
NSBMD also supports some built-in additional graphical effects, such as:

- Environment Mapping

NSBMD can be accompanied by a few additional files which can animate textures within the model itself, such as:

- NSBTA (NITRO-SYSTEM Binary Texture Animation). NSBTA animates textures on a keyframe-based system.
*uncompressed gif here*
- NSBTP (NITRO-SYSTEM Binary Texture Pattern). NSBTP animates textures by switching images on a keyframe-based system.
*uncompressed gif here*

Finally, NSBMD can be used for character models, as well, as it supports bones.
Character models are usually animated via NSBCA (NITRO-SYSTEM Binary Character Animation).
*uncompressed gif here*

While textures can be baked directly into an NSBMD itself, textures can also be stored externally in files known as NSBTX (NITRO-SYSTEM Binary TeXture archive).
It seems this was meant for larger files as it would take less time for textures to load this way - the prototype of Mario Kart DS has textures baked into the course models, while the final version has them stored in NSBTX.

File structure

0x0004uint16_tEndianness. 0xFEFF for little endian, 0xFFFE for big endian.
0x0006uint16_tVersion number.
0x0008uint32_tFile size.
0x000Cuint16_tHeader size.
0x000Euint16_tNumber of blocks.
0x0010uint32_t[x]Block offsets. This array of uint32_t's has the length of the number of blocks.

The MDL0 is the model data in an nsbmd file.
0x0004uint32_tSection size.

The TEX0 block is used for storing textures. Most models in Mario Kart DS use separate files for textures.

See Also


Last edit by Garhoogin on Fri Apr 05 16:32:38 CDT 2019