A texeture archive is a collection of images for use in a game. Texture archives in the Grand Theft Auto III game trilogy go by the extension .txd (Texture Dictionary). The files belong to RenderWare's binary stream files. Since Grand Theft Auto IV uses the new RAGE engine, it also uses different texture formats. Textures are still stored in dictionaries but they use the extension .#td, where the first character is specific for each platform:
.wtd for PC Version (Windows x86)
.xtd for Xbox 360 Version (Xenon)
.ctd for PS3 Version (Cell)
.dtd for Xbox One Version (Durango)
.otd for PS4 Version (Orbis)
.ytd for PC Version (Windows x64)
Texture formats in texture archives may vary depending on platform — on the PC version they are usually encoded as DXTn textures or raw bitmaps. The Android and iOS ports of GTA III, GTA Vice City, and GTA San Andreas can load 8-bit BMPs, although they use texture compression formats specific to the video hardware present in the device (i.e. Mali-400 for Samsung's Galaxy S2, S3 and various other devices, and Adreno or PowerVR for Androids using Qualcomm Snapdragons and Apple devices, respectively), as using bitmaps alone can present a significant performance penalty on the device.
