It looks as if the material is called black in blender, but the material.cs says its mapped to cube. Try changing the mapTo to "black"
I have change cube by black but i got the same result but I haven't write any mesh name in the material.cs files. Is it necessary ?
Towards the top it says in red: unable to find material for texture "Material". Try changing the (black) part to ("black")
It was what I have done but I have retry it and it don't work. Thanks for your time I will retry a other day. --- Post updated --- retried*