EFTB

EFTB files define certain graphical effects of objects such as emissions, particles, and shaders.

EFTB File Layout

EFTB files are made up of a header and four arrays that are aligned to 16 bytes.

• Emitter Set Array
• Texture Array
• PRM^[check] Array
• Shader Array

Each array serves as a root node in a tree structure.

EFTB Header

EFTB's header is 48 bytes and is not yet well-understood.

Header Structure

Offset (h)	Size	Data Type	Description
0x00	4	String	file signature (magic) (45 46 54 42 or "EFTB")
0x04	4	Unsigned Int	Unknown (00 00 00 14)
0x08	4	String	Unknown (47 61 6d 65 or "Game")
...

Nodes

Each node in an array's tree structure is made up of a header and three optional sections.

• Binary data
• Attribute nodes^[check]
• Child nodes

Node Header Structure

Node headers typically have the same 32-byte structure, though some are longer and some calculate certain values differently.

Offset (h)	Size	Data Type	Description
0x00	4	Unsigned Int	Signature (magic)
0x04	4	Unsigned Int	Node size. Different node types calculate this differently.
0x08	4	Unsigned Int	Offset to the first child node, or FF FF FF FF if there are no children
0x0c	4	Unsigned Int	Offset to the next sibling node, or FF FF FF FF if there are no more siblings
0x10	4	Unsigned Int	Offset to the first attribute[check], or FF FF FF FF if there are no attributes
0x14	4	Unsigned Int	Offset to the binary data, or the size of the header
0x18	4		Padding
0x1c	2	Unsigned Short	Number of child nodes. Shaders' use of this value is unknown.
0x1e	2	Unsigned Short	Unknown (00 01)

Emitter Sets (ESTA)

The Emitter Set Array (ESTA) contains any number of Emitter Sets (ESET) as child nodes.

Emitter Set (ESET)

Emitter sets have 0x60 bytes of data consisting of 0x10 bytes of padding, a 0x40 byte block containing a 0-terminated string designating the name of the emitter set, and 0x10 bytes of unknown data.

Emitter sets also contain any number of Emitters (EMTR) as child nodes.

Emitter (EMTR)

Emitters (EMTR) cause an object to cast light on surrounding surfaces. They contain the following data:

Offset (h)	Size (h)	Description
0x00	0x60	Name block, like in ESET
0x60	0x18	Six Unsigned Ints specifying the sizes of the color arrays Color 0 Alpha 0 Color 1 Alpha 1 Scale[check] Unknown
...		Unknown
0x420	0x80	Color 0 array (eight sets of four 32-bit floats describing Red, Green, Blue, and Time)
0x4a0	0x80	Alpha 0 array
0x520	0x80	Color 1 array
0x5a0	0x80	Alpha 1 array
0x620	0x40	Unknown array
0x660	0x80	Scale[check] array
...		Unknown
0xa08	0x10	Constant Color 0 if Color 0 array is empty
0xa18	0x10	Constant Color 1 if Color 1 array is empty
0xa28	0x30	Unknown
0xa58	0x60	Three 0x20 blocks consisting of a 64-bit Unsigned Long Texture ID and 0x18 bytes padding
0xab8	0x30	Unknown

Emitters can also have any number of attribute nodes (e.g. CADP, CSDP, FCSF), the purpose of which is currently unknown, as well as child emitter nodes.

Textures (TEXA)

The Texture Array (TEXA) contains any number of Textures (TEXR), with each texture containing a single GX2 Texture Block (GX2B). The TEXA tree is flattened such that all TEXR nodes appear first, followed by all of their child GX2B nodes.

(PRMA)

The PRMA^[check] contains any number of PRIM^[check] nodes.

Shaders (SHDA)

The Shader Array (SHDA) contains a single^[check] GX2 Shader Block (SHDB).