Remove black lines rendered using Cycles Why are these black lines appearing in the render when I'm using Cycles? How can I remove them? Thanks!



Update: the object is not using textures and the problem persists. This screenshot shows the mesh.

How I created the model: I selected a face from the stones model, I separated the face with "p" -> Selection, then I extruded it, I removed the old texture assignation, however a new object like a box is clear, so it seems there's a "link" with old parameters taken from the separation.



Update 2:

This is what happens if I create a new texture, with an image and the UV unwrap.



Update 3:

I created a new scene, I pasted there the object and the problem persists. Then I do the following: 


Cursor to Center
Selection to Cursor
Geometry to origin


Guess what? The lines disappear. The problem is not fixed because I don't want the object at the center of the workspace. It's for a big scene, about 400 m x 500 m.
Solution: select the object, and then select the option: 

Object -> Transform -> Origin to Geometry.

This solution is similar to the @Bithur's comment.

I don't know why it happens, but it seems Blender could have a little bug about handling textures when the objects are too far from the workspace center. For sure it's not a feature.