Covering Vertical Seams on Installed Half Log Interior Walls

I just recently installed half round 3 inch logs on the interior of my living room. We ended having 2 long vertical seams. Do you have any suggestions on how to cover them or work with them to make them not so noticeable? Someone suggested cutting into the seam to install a decorative piece of wood that would simulate something like a trim piece, but it would be set into the butt joints. I am just hesitant to actually cut into the seams while the logs are already installed. Thanks