Texture messed up from a certain distance

Hello guys.

I’ve this 3D model that when i’m far it appears a black line on the texture:

I doesn’t seem to be a Texturing error, since the Engine makes me see the model without problems as it must be:

As you can see, there’s no black line… but as long as I play in the editor, it appears (if i’m a bit distant from it).

Thanks in advance!

Most likely caused by mip maps. Do you have any black borders around your UV layout? If so try filling the empty areas with grey instead of black.

At the beginning the texture had a black color as background.

Now I changed it to transparent (alpha) and this is the result:

It’s a lot better, but some dirty parts still remain anyway