BLIGHT (File Format)

The BLIGHT (Binary LIGHT) file format in Mario Kart Wii controls lighting effects on characters, karts, items and objects in a track. It is always seen in the posteffect folder inside an U8. This file is not required for a track to load, as there is a default.blight file inside Common.szs.

File Format

The file byte order is always big endian.

File Header

The following table describes the version 2 LIGHT header.

Offset	Type	Description
0x00	Char[4]	File magic. Always LGHT in ASCII.
0x04	UInt32	File size.
0x08	UInt32	Version. Always 2.0.0.0 in Mario Kart Wii.
0x0C	UInt32	Unknown. Always 00 00 00 00.
0x10	UInt16	Number of LOBJs.
0x12	UInt16	Number of ambient colors.
0x14	Byte	Unknown. Always 00
0x15	Byte	Unknown. Always 00
0x16	Byte	Unknown. Always 00
0x17	Byte	Unknown. Always FF
0x18	Byte[16]	Unknown.

LOBJ

The first light object starts at 0x28. Each entry has the following structure.

Offset	Type	Description
0x00	Char[4]	Section magic. Always LOBJ in ASCII.
0x04	UInt32	Section size. Always 0x50.
0x08	UInt32	Version. Always 2.0.0.0 in Mario Kart Wii.
0x0C	UInt32	Unknown. Always 00 00 00 00.
0x10	Byte	Spot function.
0x11	Byte	Distance attenuation function.
0x12	Byte	Unknown. Usually 00 on unused lights, 02 most common. 01 and 04 has also been seen seen.
0x13	Byte	Light type.
0x14	UInt16	Ambient color index.
0x16	UInt16	Flag. xxxx xGFE DCBx xxxA. A: enable. B: enable G3D. C: enable GX. D: enable cut-off. E: use manual distance attenuation. F: enable G3D color. G: enable G3D alpha.
0x18	Float[3]	Light position.
0x24	Float[3]	Aim.
0x30	Float	Intensity.
0x34	Byte[4]	Light color in RGBA format.
0x38	Byte[4]	Specular color in RGBA format.
0x3C	Float	Specular cut-off angle in degrees.
0x40	Float	Distance reference.
0x44	Float	Brightness reference.
0x48	UInt32	Unknown.
0x4C	UInt32	Unknown.

Ambient Color

Ambient colors are used by each light object. Each entry has the following structure:

Offset	Type	Information
0x00	Byte[4]	RGBA ambient light color.
0x04	UInt32	Unknown.

Tools

The following tools can handle BLIGHT files:

• Wexos's Toolbox, by Wexos.