Thanks Dave!!

I checked this using an iMac with an ATI radeon x1600 card.
It does the aliasing thing.
I then checked the nvidia card on a pc, and it worked fine.
I then tried a PC with the same ATI card (a friends computer) and it did the same problem.


At school they are using ATI cards aswell and it does the anti aliasing problem.

I know there are several compatible ATI cards that maya has no problem with. Maybe you are using one of those.

Other than that, the ATI cards I tried (at school and at home)
all produced the same problem.

I think it has something to do with pixel ratio.
Even the "squares" that move across the render viewer and fill the picture, arent anti aliased. The "render square" itself has got jagged lines.

Thanks for any help!