Topless: 2 doors Lancer Evo convertible


About boxy lights : Spot are affected too. I guess you activated the RayShadow, so there is a setting called "Sample". Increase it, but carefully :)

About the modeling size it should have no effect. 1 blender unit doesn't have a mandatory real meaning, unless you give it one. I always consider 1 BU = 1 meter, so it make things easier when dealing about spacing between two body parts (eg 3 mm : 0.003 BU)