I got a doubt on what is the best method for me to select the left part of this mesh to divide this into two since this is a half-circle mesh. I am looking at the options and cannot believe this has to be done point by point to then cut the object into two. The reason for this is that I have two different textures to apply, one on the interior part of this "arch" and another on the outside. Like you can see I didn't do it right this time and some got selected on the other side
How can I in a fast way select the left part divide it and close it and then the right and do the same process?