The goal is for each normal map pixel along the joining edges to match each other. For this reason you don't want much detail along the edge as it'll make it more difficult (or impossible) to get perfect normal map continuity between the two sides.
Hi! I've been trying to use trimsheet to texture some of the parts of this mesh. Precisely, I've try to use Olsen Morten techniques to create trimsheet with a 45 degree angle but no matter how I tweak it I'm still having trouble with the dark seems... (it gets worst when having AO on top of it...) Maybe it's the way I made…