I just modeled this thing, but when I switch to dev look mode these black lines on the side of the mesh. What are those and how do I get rid of them? I used the knife tool to add edges to get clean quads. Is it related to that?
I played a bit around and found the problem. I've added new edges by connection to Points with F but this created a direct connection which interfered with the rest of the mesh.
I've solved it by just using the Knife Tool instead, but is there an easier way than the knife tool?