When using Rigify, Is there a way to add more bones to the lips? I want more control on the lips. However, when I subdivide the bones in the metarig I get errors when I try to generate.
You have to generate the rig first, then you can modify it as you want: better adding bones, withouy deleting or dividing anything, unless you know exactly what you're doing, because Rigify rig is quite complex, with lots of auxiliary and machinary bones.