2 Reverse Engineering - Textures

Lucas Schwiderski edited this page 2025-02-21 11:02:11 +00:00

Table of Contents

• General
• Formats
• Decompiling

General

There seem to be two ways that a texture can be stored in a bundle "data file" vs "stream file".

• "data file":
  • points to a file in data/ without .stream extension
  • size of the file in data/ can range from 200 bytes to several MB -> no apparent correlation
  • external == true, no data in bundle
• "stream file":
  • points to a .stream file in data/
  • data file size can range from 90 bytes to several MB
  • always contains data in the bundle file, size ranging from 200 bytes to several KB

In the case of stream files, the bundle will contain metadata (e.g. DDS headers) and a small mipmap, while the data file will contain the other mipmaps.

Other things of note:

• BundleFileHeader.unknown_1 is always 1
• textures can be duplicated across bundles

Formats

Formats observed so far:

FourCC	DXGI
DX10	BC5_UNORM

Decompiling

As an initial implementation, decompilation only extracts the largest (i.e. first) mipmap from streamed content.

Wiki

Building the source code
Obtaining the Oodle library

DTMM

Installing mods
Register DTMM as handler for Nexus downloads

DTMT

CLI Reference
Building your first mod
Migrating from loose files
dtmt.cfg Reference
Murmur hashes and dictionaries

Reverse Engineering

Getting Started
Sound
Textures

File Types

Status
Bundle
Bundle Database
Texture
Material
Strings
Package
Wwise Event
Wwise Stream
Wwise Bank