This thread may be updated with new content every so often.
Anyone is free to use anything from these in their own projects, with some proper credit.
Concept 1: Ground Zeroes Doom (Requires the latest GZDoom SVN)
Spoiler:Concpet 2: Slick City Streets (Requires GZDoom and Sprite Clipping set to "NEVER")
Spoiler:Concept 3: Smooth Elevators