Thanks Oshyan.
Yeah did a test render at 2048 with AA 3 (although with terrain disabled), which took 6:05:11 to complete and it was not very good at all - the 1024 with AA 6 was easily way better.
If I rendered at 2048 with the same settings it would probably look real nice I think - but on my setup it would be an insane render time - lol
Time for a new PC me thinks .....
Haven't been able to work out how to get TG to render all the cube faces automatically yet, so have to do each face manually, so can't use Pixel Plow I guess.
May take you up on the offer to optimize the file for me - I would probably learn a lot from your improvements.
Thanks for the input
OldFlak....