I am using a really small texture (64x64) and when I use it as a UV map on my mesh, there are some incomplete lines from the color of the other side of the UV map rendered as well (in this case, white.)
The model was made in Blender, and it is rendered without this error. I set absolute coordinates, so the UV coordinates are multiple of 1.0 (1.0, 2.0, 3.0, 4.0, etc.) I am using Ogre as renderer
This is the UV map:

Image with error:

tex_address_modetoclamp; ogre3d.org/docs/manual/manual_17.html#tex_005faddress_005fmode \$\endgroup\$