New Vision is a retexturing mod for the original Deus Ex, made between 2007 to 2012. A few others contributed but 99% of the textures were solely by me. The project used a little-known feature of Unreal Engine 1 that allowed S3TC (now known as DXT-1) texture loading to replace the original textures with high resolution counterparts.
Most textures were up-sized 8x - so 128x128 (the most common resolution) was replaced by 1024x1024. Some larger surfaces used up to 4k textures to reduce tiling artefacts, and screens that were originally animated with 3-6 frames (at 1 frame per second) were replaced with 30fps counterparts. Surprisingly, this didn't kill the engine, even though it was brute-forced.
Due to the engine's limitations, all surface lighting was baked into the diffuse texture.
The mod is available for download on ModDB, or as part of Deus Ex Revision on Steam.
http://www.moddb.com/mods/ne