Gotta have respect for this actor- he's done it all and well too.
The "likeness" factor you mention.... you picked different features from different points in his long life, I think. The background shadows are accurate in shape but not opacity (given the face lighting), and I noticed the darkening on his ill rendered jacket resembles the shadows too much, so that's a bit of an error. Shouldn't perlman be one of the tags?
Still a nice likeness and approach that warrants further experimentation.