thats a REALLY good question, im still always in debate with myself. i always have this feeling that adding line art helps make it an illustration, and not adding it leaves it a portrait. if that makes sense? of course, sometimes, you just go with your gut and hope you dont mess up.
yes it makes perfect sense. never looked at it that way. so when you don't add lines, do you just paint over them(pencil lines)?? and when you do non black lines, how do you get the lines to be certain colors?? does it start with standard pencil?? thanks in advance for answering these questions. you sir, rock!!