this is a real noob question, but since I purchased the octane Cinema 4D plugin in march 2013 I havent really been able to play arround with it

Anyways I am having a problem where there seems to be a kind of default lighting within a scene. I already deactivated C4Ds default light. But I suppose I am overlooking something really fundamental here but can´t get it to work right. The attached scene only inludes a cube, a plane and one light, so I thought it should only be lit by that one light, but somehow the whole scene is lit.
Any suggestions?
I am using C4D R15 and the octane renderer 1.20 although the Live viewer Beta within C4D says Beta 0.96 SDK 1.2