I've recently created a humanoid model to use for animating in the cycles engine, and in the texture view and material view, it looks fine. However in the rendered view, I get strange black spots on my model, i've attached the blend file, if anyone could help me to fix this issue, I would be extremely grateful.
The reason parts of the mesh appear black, is because two vertices are in the same location, and blender renders them as black.
Deleting the vertices:
Select the vertices you don't need, and press Delete, and select
Dissolve Vertices. This will remove the vertices and remove the black overlapping mesh int he Rendered view.
Merging the vertices
Instead of deleting them, it may be better to merge them. Select two vertices in a similar location, and press Alt+M and select
At Center, if you want to merge the vertices in the middle of both vertices. This will make them into one vertical, without removing any other lines the deleting method would.