However, whatever the man Jesus looked like that was just His mortal human vessel. It's what was inside that counts. After His resurrection people who knew him could have long conversations and share food with Him before realizing Who they were with. So IMHO, just as He had the evident power to manipulate "reality" to change water into wine, feed a multitude from a small basket of food, and raise the dead, He could, did, and no doubt does appear however He chooses.
The only thing I find objectionable about the various representations of Jesus, is the tendency to make him look like a soy boy. He was the son of a carpenter, when an adze was high tech equipment. He probably had shoulders like a lumberjack and forearms like Popeye the Sailor. Unless Joseph never took him to work.