Time and time again the explanation in the 1983 ROTJ novelization is mentioned, but nobody listens. ![Big grin :D :D](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Anakin *wanted* Luke to see him as he used to be. If you don't like that explanation then just assume that the spirits appear as "residual self images." The last time Anakin saw his own unscarred face it was back during ROTS. He wouldn't have even known what he was supposed to look like as a 50 year old. He appeared as he remembered himself.
Either explanation works perfectly fine for me.
Anakin *wanted* Luke to see him as he used to be. If you don't like that explanation then just assume that the spirits appear as "residual self images." The last time Anakin saw his own unscarred face it was back during ROTS. He wouldn't have even known what he was supposed to look like as a 50 year old. He appeared as he remembered himself.
Either explanation works perfectly fine for me.