An alternative thing to try might be adding this to the texture's TXI:
Without ndix UR's lines of course.
Thanks DarthParametric. This is very good too. It doesn't remove the line quite as completely as ndix UR's method, but it doesn't have any visible side effects. I'll keep this one in and see how it goes.
@ olnorton: is your new texture the same resolution as the old one, and if not, what is it?
When I said TPA, I meant TPC sorry, as in adding it to try and fix the default Mission. But the TXI file is still in there and it hasn't help my re-textured 1024x1024 Mission. The poor girl has taken to keeping her head bowed, you know how teenagers are with anything on their faces.
ndix UR, That is a noticeable difference, do you have an AMD graphics card?