I changed all the tile images in authui.dll , however , the tile still displays a 2D version of it, not beveled as it use to. Also set the secpol.msc to Enable the display of last logged on user. That did not work. Sad to say, I'm not as dedicated to this stuff anymore.
authui.dll modified tiles
secpol enforced / authui.dll modified tiles
It would be nice if someone would pick up on it... hopefully someone will and have the same idea that the old classic logon was a bit more professional and original.