Thief Gold upscaled textures and cinematics using ESRGAN neural network. Most of the textures correctly tiled by hand after the upscaling when tiling is present so there is mostly no edges between same textures.
This is upscaled textures from EP1 (in case you installed it during TFix installation). Authentical version with maximum vanilla compatible look. Unpack/overwrite into game directory after Base and TFix files.