This is a new txd texture editor for GTA3, Vice City and San andreas.
Works for all gta3, vc and SA, supports all txd formats, including compressed, latest version even supports working within img files.
Upgraded in 2010 with a brand new DXT compressor/decompressor using libsquish to improve reliability and image quality.
Updated in 2012 to restore multi-file export options.
You need edit the alpha of the image
1- Use some editor that use alpha (I use Ps CS6).
2-(If you use Ps)In channels, click "Add a channel"
He will be called Alpha 1, black is translucent, white is
solid and gray is semi-translucent, edit this channel.
3-Save as BMP and mark the box "Alpha channels".
Import this image to TXT Workshop.