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Update Reverse Engineering - Textures

Lucas Schwiderski 2025-02-21 11:02:11 +00:00
parent b886c207d3
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Signed by: Forgejo (git.sclu1034.dev)
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19
Reverse Engineering - Textures.-.md

@ -1,9 +1,22 @@
## General
Textures are usually split into two data blobs:
There seem to be two ways that a texture can be stored in a bundle "data file" vs "stream file".
- Metadata and a small mipmap directly in the bundle
- All other mipmaps in stream files
- "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