The Development Project is a HL2 modification made out of manipulated Dev textures as a project for those that enjoy the simplicity of the original measuring textures created by valve scattered throughout the map but also enjoy all the effects, adventures and creativity of regular mods.
Concept art from Update #1 which can be viewed in greater resolution if clicking (view original).
Pool and Blue Concept
This concept was made for dark watery areas where blue is the main feature here but focused mainly inside the pool to give the area a bit of a lonely look to it.
Orange and Fire Concept
This here was made to test what would happen with the lighting and reflections of other aspects around the map where bump mapping and env reflections were added to some objects to make the atmosphere a bit more alive with the fire bursting out of the pipes.