A comp meaning composite. . . in the terms of special effects.
its a 3-D model some dude did and composited onto pictures of a flight deck... probably replacing and aircract that was there before.
Did a pretty good job too nice lighting and comp work. . .
The planes design is what makes it look fake ,, , has too much cool and not enough practical or realistic design in it.
Check this forum out, , , people doing some realy nice CG aircraft ... well and there is some bad ones in there too.
Ranging from profesional to "hey mommy look what I made"
http://www.cgtalk.com/showthread.php?t=39835 MonkyMeat
composite