Often when I’m drawing a portrait the likeness is off because one (or typically many) things aren’t correct. But no matter how long I stare at it I can’t figure out what the issue is. Then when I put reference on top in a graphics program it’s super obvious all the problems. How can I get better at ‘seeing’ the problems so I can fix them? And what is a good process to go through or things to check when trying to find out why likeness isn’t happening to see where the issue is?