Well I persisted and found the answer to totally remove the shadow !
This setting ( 0 by default ) puts a shadow in T-cam Rear mirrors.
To turn off the shadow change to 1 (static)
It must have been programmed back-to-front !?
1; [MIRROR VIEW] Shadow type (under cars) (0=> off, 1=> static, 2=> composite, 3=> projected)
It looks much better now
Perhaps everyone else already knew this ???
I did a search on this forum and High Gear but it had never been an issue... curious as it bugged the sh*t outta me !!!!