Rendering artifacts


I have some artifacts on my character when rendering the animation. I guess it is something with the light or the shadows and some resolution, but I do not have these lines on his belly in my texture. Any ideas on what settings to change?

I see similar lines on the boxes.

Hmmmm strange indeed. Have you tried switching the lamp type to see if it has to do with the light? I would try increasing the softbesa of the light too and the angle