www.fusedreality.com is making a Half-Life2 Mod entitled 'Project Shadow', and when I asked if i could help, they gladly said yes. I will be doing graphical work not directly related to the game (with the exception of possibly textures). Here is the first item of mine to come from this project.
This is the 1280x1024 version of the promo wallpaper. The other versions (later availible on fused reality's site) will be 800x600, 1024x768, 1280x1024, and 1600x1200.