I would be interested to know if there was any real evidence that Jesus actually came from Ra in some way and wasn't a real person. When I tried to look for myself, I found that name you were talking about, Acharya S/D.M. Murdock:
http://www.stellarhousepublishing.com/christinegypt.html
Stellar House Publishing, from what I remember reading, is Acharya's own publishing company. She publishes her own books if not mistaken.
As for whether Jesus came from Ra or not, none of the primary Egyptian texts we have suggest this even remotely. The problem with me trying to prove this is that it would require me posting pages of ancient Egyptian texts just to show the readers (who'll have to read them themselves!) that there is no pre-Jesus Gospel in any of those texts. Same with ancient Greek and Roman mythology and Norse mythology and so on.
It'd be much easier if the opposite side (I don't necessarily mean you, ZEGH) were to just post the relevant text from these sources providing evidence that there's a Gospel link or any remarkable link between Jesus and Ra (or Horus or Osiris).
But, honestly, I really really doubt there is (99% sure there isn't) as it would mean there's a conspiracy going on among all the historians (among whom are secular ones) and experts in other relevant fields who refuse to publicize these controversial passages in mainstream encyclopedias and such.
It's just not likely that Jesus was copied from prior characters due to what the evidence suggests to us.
I remember seeing a program on the History Channel which said that many art historians believe that the early paintings of Jesus were based on the facial features of Zeus' statue, but unfortunately I can't remember which program it was.
I think this might be a clip from the show that I saw:
But we don't really know what Jesus looked like anyway. None of the primary sources for Jesus describe his facial features as far as I can recall just now.
As for the earliest paintings of Jesus, assuming the facial features were copied from Zeus, it could mean anything. Maybe the artists never knowing what Jesus himself ever looked like thought "Hey, I would imagine him to have looked like the Zeus portrayed by the Greeks. Let's draw his face like that." or "Let's attract the pagans by making out to be like their Zeus."
I don't know really and don't have much knowledge in this specific area.