Select the polys on the model you wish to texture.
选择你模型里想要做纹理的那些多边形。
2
For the 3 lines problem, again, divide your polys at the intersections to prevent fighting.
对于3线的问题，再把你的息肉，在交叉口以防止战斗。
3
This way you can limit the amount of polys per object you are working on, making it all a lot less painfull when your total polycount is reaching the 500.000 mark.