Remove black lines rendered using Cycles

Question

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.

Please update your questions with additional information regarding how the material nodes, whether you're using UVs, the UV map - anything that might help determine the problem. — Rich Sedman, Apr 11 '19 at 08:00
The way the lines are shaped definitely looks like a texture forgotten somewhere. Baked lighting perhaps? — John Dvorak, Apr 11 '19 at 11:45
Or bad mapping. Try a generated or object mapping instead of UV (default) or unwrap to get new UV — Bithur, Apr 11 '19 at 12:02
i had a similar problem here with the same kind of fix (change of origin and back to world origin) — Bithur, Apr 11 '19 at 13:45

score 2 · Accepted Answer · answered Apr 11 '19 at 19:49

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.

Remove black lines rendered using Cycles

1 Answers1