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
• Child nodes
• Attribute nodes^[check]

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), with each set containing any number of Emitters (EMTR). Emitters cause an object to cast light on surrounding surfaces. Emitters can also have any number of attribute nodes (e.g. CADP, CSDP, FCSF), the purpose of which is currently unknown.

Textures (TEXA)

The Texture Array (TEXA) contains any number of Textures (TEXR), with each texture containing a single^[check] GX2 Texture Block (GX2B).

Shaders (SHDA)

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