A number of tools have been developed by members of the community to open .txd files and extract/replace the textures, allowing for the modification of the game's appearance. The most notable is TXD Workshop which is developed by Delfi. Some links to this and other tools are below.
Most TXD files are stored inside the gta3.img archive.
- TXD Workshop
- TXD Viewer - for viewing .txd files on PS2 discs.
- TXDTool for GTA3 only
- ViceTXD For Vice City only