R350/NV35 Z Fillrate with FSAA

[Tagrineth]

Not that it´s related at all, but I did have the feeling that Vertical did offset LOD by -0.5 (estimated value), while Horizontal didn´t. I did ask back then, but no one ever answered that question, thus I´m rather uncertain about it. Speaking of is there any particular reason why PowerVR has for two samples exclusive modes for either x or y (tile size maybe being a reason?).

In theory all ordered-grid supersamplers ought to offer such a choice, because sometimes one looks better, sometimes the other looks better (depends - does the game have a lot of near horizontals, or a lot of near verticals?).