Cloned Cube is a Portal mod. It takes place after GLaDOS' fall in Portal. You assume the role of Chell's secret clone. You have to escape or else you may just be tested to death. There is one obstacle. CUBiS is trying to kill you.
In the past I've used all these oilfied, ugly background images for the main menu of Cloned Cube. Not anymore! This is a picture I made in the Source Filmmaker using cc_1 and Cloned Cube content. I think that this makes the menu look incredibly nice and load incredibly fast since there's not background map.