Half-Life: Source Enhanced is an HD replacement pack for the default Half-Life: Source content. This includes models, materials, and map textures. Not to mention the other content that is also released in this mod.
Due to a lack of updates here and on the Facepunch thread I felt I should post some screenshots of Uplink: Source on the thread, with Half-Life: Source Enhanced content. It came out looking really good with high definition features and I also took advantage of some Source features (Fire, steam, ragdolls) rather then just leaving the old HL1 ways.
Let me remind you this is still pretty WIP. Expect to notice a few minor bugs or visual issues here and there. I'm not sure what I might change or add to the levels eventually. With that said feel free to post some ideas about what you think would improve the levels.